Eight students: K, L, M, N, O, P, Q and R

i)There are exactly two persons sitting to the left of L.

ii) 3 people sit between K and R and neither of K nor R is a neighbour of L.

(This means K and R can’t occupy the 2^nd and 4^th position.

Also, they can’t occupy the position after that because there are 4 vacant places and there are 3 people to be accommodated in between K and R which totals to 5 which is not possible. Hence, either K or R occupies the 1^st position.)

iii) M sits to the left of K.

(So, K can’t be at the extreme left.)

iv) Only one person is sitting between N and P and neither of them is sitting at the extreme ends.

v) Q is a neighbour of P. It means P can’t occupy positions between R and L and L and K as the positions surrounding them are already occupied.

Therefore, the final arrangement is as follows:

Hence, O sits at the extreme right.

Eight students: K, L, M, N, O, P, Q and R

i)There are exactly two persons sitting to the left of L.

ii) 3 people sit between K and R and neither of K nor R is a neighbour of L.

(This means K and R can’t occupy the 2nd and 4th position.

Also, they can’t occupy the position after that because there are 4 vacant places and there are 3 people to be accommodated in between K and R which totals to 5 which is not possible. Hence, either K or R occupies the 1st position.)

iii) M sits to the left of K.

(So, K can’t be at the extreme left.)

iv) Only one person is sitting between N and P and neither of them is sitting at the extreme ends.

v) Q is a neighbor of P. It means P can’t occupy positions between R and L and L and K as the positions surrounding them are already occupied.

Therefore, the final arrangement is as follows:

Hence, L sits second to the left of K.

Eight students: K, L, M, N, O, P, Q and R

i)There are exactly two persons sitting to the left of L.

ii) 3 people sit between K and R and neither of K nor R is a neighbour of L.

(This means K and R can’t occupy the 2nd and 4th position.

Also, they can’t occupy the position after that because there are 4 vacant places and there are 3 people to be accommodated in between K and R which totals to 5 which is not possible. Hence, either K or R occupies the 1st position.)

iii) M sits to the left of K.

(So, K can’t be at the extreme left.)

iv) Only one person is sitting between N and P and neither of them is sitting at the extreme ends.

v) Q is a neighbour of P. It means P can’t occupy positions between R and L and L and K as the positions surrounding them are already occupied.

Therefore, the final arrangement is as follows:

Hence, there are four students sits between M and Q.

1) A is sitting in third place form the right end.

2) There are 2 people between A and C.

3) There is one person between C and D.

4) E is to the second left of D.

5) H is to the fifth right of C.

6) A is exactly sitting between B and F who is to the right of A.

7) G is to the second left of J who is to the second left of I.

Hence, J is exactly sitting between G and I.

1) A is sitting in third place form the right end. 

2) There are 2 people between A and C. 

3) There is one person between C and D. 

4) E is to the second left of D. 

5) H is to the fifth right of C. 

6) A is exactly sitting between B and F who is to the right of A. 

7) G is to the second left of J who is to the second left of I.

Hence, the statement given only in option 2 is correct.

1) A is sitting in third place form the right end. 

2) There are 2 people between A and C. 

3) There is one person between C and D. 

4) E is to the second left of D. 

5) H is to the fifth right of C. 

6) A is exactly sitting between B and F who is to the right of A. 

7) G is to the second left of J who is to the second left of I.

Hence, there are 3 persons are sitting between C and F.

Persons - T, U, V, W, X, Y and Z

People are facing both directions North and South.

1. V sits three places away from X, who faces north. X and W are neighbours and they face the same direction. Z sits to the immediate right of W.

So, W faces north.

Case 1:

Case 2:

2. T sits fourth to the left of U. The neighbours of T face the same direction and do not sit to the right of W.

This is not possible in case 2. So, case 1 is correct.

3. No three adjacent persons face the same direction. U and V face different directions.

So, V, T and Z face the south direction.

Hence, T sits third to the right of Z.

Persons - T, U, V, W, X, Y and Z

People are facing both directions North and South.

1. V sits three places away from X, who faces north. X and W are neighbours and they face the same direction. Z sits to the immediate right of W.

So, W faces north.

Case 1:

Case 2:

2. T sits fourth to the left of U. The neighbours of T face the same direction and do not sit to the right of W.

This is not possible in case 2. So, case 1 is correct.

3. No three adjacent persons face the same direction. U and V face different directions.

So, V, T and Z face the south direction.

Hence, if Z and Y interchange their places, X sits to the immediate left of T.

Persons - T, U, V, W, X, Y and Z

People are facing both directions North and South.

1. V sits three places away from X, who faces north. X and W are neighbours and they face the same direction. Z sits to the immediate right of W.

So, W faces north.

Case 1:

Case 2:

2. T sits fourth to the left of U. The neighbours of T face the same direction and do not sit to the right of W.

This is not possible in case 2. So, case 1 is correct.

3. No three adjacent persons face the same direction. U and V face different directions.

So, V, T and Z face the south direction.

Hence, except WZ in all other options the second person sits to the immediate left of the first person.

Persons: A, B, C, D, E and F.

Each of them likes different number i.e., 1, 2, 3, 4, 5, 6.

1) There are either one or three persons between E and F.

2) F sits one of the extreme ends and likes number 6.

3) The person who sits on one of the extreme position likes number 1.

4) There is a gap of two persons between B and F.

5) C sits immediate right of E.

6) A does not sit immediately next to either F or B.

7) There are two persons amid the one who likes number 4 and the one who likes number 3.

8) D does not like an odd number.

9) The neighbours of E do not like even numbers.

Persons: A, B, C, D, E and F.

Each of them likes different number i.e., 1, 2, 3, 4, 5, 6.

1) There are either one or three persons between E and F.

2) F sits one of the extreme ends and likes number 6.

3) The person who sits on one of the extreme position likes number 1.

4) There is a gap of two persons between B and F.

5) C sits immediate right of E.

6) A does not sit immediately next to either F or B.

7) There are two persons amid the one who likes number 4 and the one who likes number 3.

8) D does not like an odd number.

9) The neighbours of E do not like even numbers.

C likes number 3

Persons: A, B, C, D, E and F.

Each of them likes different number i.e., 1, 2, 3, 4, 5, 6.

1) There are either one or three persons between E and F.

2) F sits one of the extreme ends and likes number 6.

3) The person who sits on one of the extreme position likes number 1.

4) There is a gap of two persons between B and F.

5) C sits immediate right of E.

6) A does not sit immediately next to either F or B.

7) There are two persons amid the one who likes number 4 and the one who likes number 3.

8) D does not like an odd number.

9) The neighbours of E do not like even numbers.

A sits immediately to the left of D.

Hence, no one sits between A and D

1) B sits third to the right of E.

2) The one who faces B sits second to the left of Z.

3) Two people sit between V and Z.(This eliminates case 2)

4) W and Y are immediate neighbors of each other.

5) More than one person sits to the left of Y.

6) Only one person sits between A and C.

7) A does not face Y.

1) B sits third to the right of E.

2) The one who faces B sits second to the left of Z.

3) Two people sit between V and Z.(This eliminates case 2)

4) W and Y are immediate neighbors of each other.

5) More than one person sits to the left of Y.

6) Only one person sits between A and C.

7) A does not face Y.

All sit at extreme ends except B.

1) B sits third to the right of E.

2) The one who faces B sits second to the left of Z.

3) Two people sit between V and Z.(This eliminates case 2)

4) W and Y are immediate neighbors of each other.

5) More than one person sits to the left of Y.

6) Only one person sits between A and C.

7) A does not face Y.

Clearly, V sits second to the left of the one who faces C.