Persons: A, B, C, D, E, F and G. (Facing north)

Profession: Teacher, Architect, Businessman, Engineer, Lawyer. Banker and Doctor.

1) Three persons sit between D and the one who is a Banker. D is sitting at one of the extreme ends of the row.

2) A who is a Doctor is an immediate neighbour of D.

3) G is not an immediate neighbour of A and the one who is a Banker.

4) The one who is a lawyer sits to the immediate right of E who is a Teacher.

5) G is not a Lawyer.

6) Neither B nor F is a Banker. So, C will be Banker.

7) B is not an immediate neighbour of C. 

As the 1st case does not fulfil the above condition (B is not an immediate neighbour of C), it is eliminated.

8) The one who is an Engineer does not sit at any of the extreme ends of the row.

9) D is not an Architect. So, G will be Architect.

The final arrangement will be:

As C is a Banker.

Persons: A, B, C, D, E, F and G. (Facing north)

Profession: Teacher, Architect, Businessman, Engineer, Lawyer. Banker and Doctor.

1) Three persons sit between D and the one who is a Banker. D is sitting at one of the extreme ends of the row.

2) A who is a Doctor is an immediate neighbour of D.

3) G is not an immediate neighbour of A and the one who is a Banker.

4) The one who is a lawyer sits to the immediate right of E who is a Teacher.

5) G is not a Lawyer.

6) Neither B nor F is a Banker. So, C will be Banker.

7) B is not an immediate neighbour of C. 

As the 1st case does not fulfil the above condition (B is not an immediate neighbour of C), it is eliminated.

8) The one who is an Engineer does not sit at any of the extreme ends of the row.

9) D is not an Architect. So, G will be Architect.

The final arrangement will be:

Hence, only one person is sitting between B and C.

Persons: A, B, C, D, E, F and G. (Facing north)

Profession: Teacher, Architect, Businessman, Engineer, Lawyer. Banker and Doctor.

1) Three persons sit between D and the one who is a Banker. D is sitting at one of the extreme ends of the row.

2) A who is a Doctor is an immediate neighbour of D.

3) G is not an immediate neighbour of A and the one who is a Banker.

4) The one who is a lawyer sits to the immediate right of E who is a Teacher.

5) G is not a Lawyer.

6) Neither B nor F is a Banker. So, C will be Banker.

7) B is not an immediate neighbour of C. 

As the 1st case does not fulfil the above condition (B is not an immediate neighbour of C), it is eliminated.

8) The one who is an Engineer does not sit at any of the extreme ends of the row.

9) D is not an Architect. So, G will be Architect.

The final arrangement will be:

Hence, F is fourth to the left of A.

Persons: A, B, C, D, E, F and G. (Facing north)

Profession: Teacher, Architect, Businessman, Engineer, Lawyer. Banker and Doctor.

1) Three persons sit between D and the one who is a Banker. D is sitting at one of the extreme ends of the row.

2) A who is a Doctor is an immediate neighbour of D.

3) G is not an immediate neighbour of A and the one who is a Banker.

4) The one who is a lawyer sits to the immediate right of E who is a Teacher.

5) G is not a Lawyer.

6) Neither B nor F is a Banker. So, C will be Banker.

7) B is not an immediate neighbour of C. 

As the 1st case does not fulfil the above condition (B is not an immediate neighbour of C), it is eliminated.

8) The one who is an Engineer does not sit at any of the extreme ends of the row.

9) D is not an Architect. So, G will be Architect.

The final arrangement will be:

Hence, G is an Architect.

Persons: A, B, C, D, E, F and G. (Facing north)

Profession: Teacher, Architect, Businessman, Engineer, Lawyer. Banker and Doctor.

1) Three persons sit between D and the one who is a Banker. D is sitting at one of the extreme ends of the row.

2) A who is a Doctor is an immediate neighbour of D.

3) G is not an immediate neighbour of A and the one who is a Banker.

4) The one who is a lawyer sits to the immediate right of E who is a Teacher.

5) G is not a Lawyer.

6) Neither B nor F is a Banker. So, C will be Banker.

7) B is not an immediate neighbour of C. 

As the 1st case does not fulfil the above condition (B is not an immediate neighbour of C), it is eliminated.

8) The one who is an Engineer does not sit at any of the extreme ends of the row.

9) D is not an Architect. So, G will be Architect.

The final arrangement will be:

Hence, D is a Businessman.

1) G faces North, only three people sits to the left of G.

2) Only two people sit between G and S.

3) H sits third to the right of K. K is neither an immediate neighbor of G nor S.

4) K does not sit at any of the extreme end of the line.

Hence we have two cases:- 

5) The only neighbor of F faces north. F is not an immediate neighbor of K. A is sitting second to the left of F. A faces the same direction as K.

Here case – 1 gets cancelled because there is no place left for A because A is sitting second to the left of F and F will face north direction and K is already sitting second to the left of F.

6) The person sitting at extreme ends facing opposite directions.

7) D faces the same direction as F. H faces south.

The final arrangement is given below-

We can clearly see that in the diagram there 6 people facing north direction.

Hence, the correct answer is 6

1) G faces North, only three people sits to the left of G.

2) Only two people sit between G and S.

3) H sits third to the right of K. K is neither an immediate neighbor of G nor S.

4) K does not sit at any of the extreme end of the line.

Hence we have two cases:- 

5) The only neighbor of F faces north. F is not an immediate neighbor of K. A is sitting second to the left of F. A faces the same direction as K.

Here case – 1 gets cancelled because there is no place left for A because A is sitting second to the left of F and F will face north direction and K is already sitting second to the left of F.

6) The person sitting at extreme ends facing opposite directions.

7) D faces the same direction as F. H faces south.

The final arrangement is given below-

Common Solution:

We can see that in all four combinations i.e. (J, D) (G, K) (S, H) (A, F) there are gap of one person, but in (D, A) there are gap of two person. So our answer is (D, A).

1) G faces North, only three people sits to the left of G.

2) Only two people sit between G and S.

3) H sits third to the right of K. K is neither an immediate neighbor of G nor S.

4) K does not sit at any of the extreme end of the line.

Hence we have two cases:- 

5) The only neighbor of F faces north. F is not an immediate neighbor of K. A is sitting second to the left of F. A faces the same direction as K.

Here case – 1 gets cancelled because there is no place left for A because A is sitting second to the left of F and F will face north direction and K is already sitting second to the left of F.

6) The person sitting at extreme ends facing opposite directions.

7) D faces the same direction as F. H faces south.

The final arrangement is given below-

We can clearly see that there are only two people facing south.

Hence, the correct answer is two.

1) G faces North, only three people sits to the left of G.

2) Only two people sit between G and S.

3) H sits third to the right of K. K is neither an immediate neighbor of G nor S.

4) K does not sit at any of the extreme end of the line.

Hence we have two cases:- 

5) The only neighbor of F faces north. F is not an immediate neighbor of K. A is sitting second to the left of F. A faces the same direction as K.

Here case – 1 gets cancelled because there is no place left for A because A is sitting second to the left of F and F will face north direction and K is already sitting second to the left of F.

6) The person sitting at extreme ends facing opposite directions.

7) D faces the same direction as F. H faces south.

The final arrangement is given below-

We can clearly see that there are four persons sitting between K and S.

Hence, the correct answer is four.

1) G faces North, only three people sits to the left of G.

2) Only two people sit between G and S.

3) H sits third to the right of K. K is neither an immediate neighbor of G nor S.

4) K does not sit at any of the extreme end of the line.

Hence we have two cases:- 

5) The only neighbor of F faces north. F is not an immediate neighbor of K. A is sitting second to the left of F. A faces the same direction as K.

Here case – 1 gets cancelled because there is no place left for A because A is sitting second to the left of F and F will face north direction and K is already sitting second to the left of F.

6) The person sitting at extreme ends facing opposite directions.

7) D faces the same direction as F. H faces south.

The final arrangement is given below-

Hence, the correct answer is J.

Persons: Row:1: A, B, C, D, E and F are seated facing South

Row:2: Row 2: G, H, I, J, K and L are seated facing North

1) L sits third to the left of G. G does not sits at the extreme end of the row.

2) The one who faces L is an immediate neighbour of C.

3) Two person sits between C and F.

4) D sits to the immediate right of A.

5) D is not an immediate neighbour of C.

As the 1^st and 2^nd case does not fulfil the above condition, it is eliminated.

6) I face D.

7) E does not face G.

8) Neither H nor K faces E.

9) K does not sit in front of C.

The final arrangement will be:

Hence, three persons are sitting between K and L.

Persons: Row:1: A, B, C, D, E and F are seated facing South

Row:2: Row 2: G, H, I, J, K and L are seated facing North

1) L sits third to the left of G. G does not sits at the extreme end of the row.

2) The one who faces L is an immediate neighbour of C.

3) Two person sits between C and F.

4) D sits to the immediate right of A.

5) D is not an immediate neighbour of C.

As the 1^st and 2^nd case does not fulfil the above condition, it is eliminated.

6) I face D.

7) E does not face G.

8) Neither H nor K faces E.

9) K does not sit in front of C.

The final arrangement will be:

Hence, A sits third to the right of B.

Persons: Row:1: A, B, C, D, E and F are seated facing South

Row:2: Row 2: G, H, I, J, K and L are seated facing North

1) L sits third to the left of G. G does not sits at the extreme end of the row.

2) The one who faces L is an immediate neighbour of C.

3) Two person sits between C and F.

4) D sits to the immediate right of A.

5) D is not an immediate neighbour of C.

As the 1^st and 2^nd case does not fulfil the above condition, it is eliminated.

6) I face D.

7) E does not face G.

8) Neither H nor K faces E.

9) K does not sit in front of C.

The final arrangement will be:

Hence, I sit second to the left of H.

Persons: Row:1: A, B, C, D, E and F are seated facing South

Row:2: Row 2: G, H, I, J, K and L are seated facing North

1) L sits third to the left of G. G does not sits at the extreme end of the row.

2) The one who faces L is an immediate neighbour of C.

3) Two person sits between C and F.

4) D sits to the immediate right of A.

5) D is not an immediate neighbour of C.

As the 1^st and 2^nd case does not fulfil the above condition, it is eliminated.

6) I face D.

7) E does not face G.

8) Neither H nor K faces E.

9) K does not sit in front of C.

The final arrangement will be:

Hence, J sits in front of E.

Persons: Row:1: A, B, C, D, E and F are seated facing South

Row:2: Row 2: G, H, I, J, K and L are seated facing North

1) L sits third to the left of G. G does not sits at the extreme end of the row.

2) The one who faces L is an immediate neighbour of C.

3) Two person sits between C and F.

4) D sits to the immediate right of A.

5) D is not an immediate neighbour of C.

As the 1^st and 2^nd case does not fulfil the above condition, it is eliminated.

6) I face D.

7) E does not face G.

8) Neither H nor K faces E.

9) K does not sit in front of C.

The final arrangement will be:

As G is sitting in front of B.

Hence, the condition ‘G faces B’ is true and the other conditions are false.