F letter is fourth to the left of the sixteenth from the left end.

W 1 @ C U # E T 9 S 5 F % R 5 6 G Q * H P I ^ O 7 J  β K 8 L  π 3 N M. consonant / numbers / symbol. w1@
Only one the one group numbers are there in the above arrangement each of which is immediately preceded by a consonant and immediately followed by a symbol.

β  is eighth to the right of the sixteenth from the right end. 

Lets separate the confirm conditions first so that we can easily find positions of given variables as follows: 
 Sohan likes Black but he does not like Fossil or Timex. 
 Roli likes Blue, does not like Casio or Fastrack.
 Vihan is neither likes Pink nor a White, but Vihan likes Timex
 Uma likes Tissot and she likes Brown .
 Piyush likes to wear Fossil watch.

From the statement the one who likes white color likes Fastrack is possibly true for the one whose position is vacant in both watches and color and that is Anil.
So we can definitely say Anil likes to wear Fastrack and white color he likes.
 Now first separate the remaining variables , Yellow and Pink is left in color and Casio, Titan and Sonata watches are left in watches.
As per given information Vihan does not like Pink that means its confirm he likes Yellow because we have only two varble left in color.  And also Piyush likes Pink color. Tiya likes Orange color and she does not like Sonata i.e Tiya either likes Titan or Casio.  As per given information  i.e Roli, who likes Blue, does not like Casio or Fastrack and also does not like Titan means we have three variable left in the watches
Out of which she neither likes Casio nor Titan so definitely she likes Sonata. 
So we can’t say which watch is likes by Sohan and Tiya they either likes Titan or Casio. Final arrangement is as follows:
R likes blue and Sonata. 

Lets separate the confirm conditions first so that we can easily find positions of given variables as follows: 
 Sohan likes Black but he does not like Fossil or Timex. 
 Roli likes Blue, does not like Casio or Fastrack.
 Vihan is neither likes Pink nor a White, but Vihan likes Timex
 Uma likes Tissot and she likes Brown .
 Piyush likes to wear Fossil watch.

From the statement the one who likes white color likes Fastrack is possibly true for the one whose position is vacant in both watches and color and that is Anil.
So we can definitely say Anil likes to wear Fastrack and white color he likes. 
Now first separate the remaining variables , Yellow and Pink is left in color and Casio, Titan and Sonata watches are left in watches. 
As per given information Vihan does not like Pink that means its confirm he likes Yellow because we have only two varble left in color. And also Piyush likes Pink color. Tiya likes Orange color and she does not like Sonata i.e Tiya either likes Titan or Casio. As per given information i.e Roli, who likes Blue, does not like Casio or Fastrack and also does not like Titan means we have three variable left in the watches 
Out of which she neither likes Casio nor Titan so definitely she likes Sonata. 
So we can’t say which watch is likes by Sohan and Tiya they either likes Titan or Casio. Final arrangement is as follows:

The one who likes orange likes Titan or Casio watches. So answer can’t be determined and we can mark 4). 

Lets separate the confirm conditions first so that we can easily find positions of

given variables as follows: 
 Sohan likes Black but he does not like Fossil or Timex. 
 Roli likes Blue, does not like Casio or Fastrack.
 Vihan is neither likes Pink nor a White, but Vihan likes Timex
 Uma likes Tissot and she likes Brown .
 Piyush likes to wear Fossil watch.
From the statement the one who likes white color likes Fastrack is possibly true for the one whose position is vacant in both watches and color and that is Anil.
So we can definitely say Anil likes to wear Fastrack and white color he likes. 
Now first separate the remaining variables , Yellow and Pink is left in color and Casio, Titan and Sonata watches are left in watches. 
As per given information Vihan does not like Pink that means its confirm he likes Yellow because we have only two varble left in color. And also Piyush likes Pink color. Tiya likes Orange color and she does not like Sonata i.e Tiya either likes Titan or Casio. As per given information i.e Roli, who likes Blue, does not like Casio or Fastrack and also does not like Titan means we have three variable left in the watches 
Out of which she neither likes Casio nor Titan so definitely she likes Sonata. 
So we can’t say which watch is likes by Sohan and Tiya they either likes Titan or Casio. Final arrangement is as follows:

Piyush likes Pink. So answer is 3).

Lets separate the confirm conditions first so that we can easily find positions of given variables as follows: 
 Sohan likes Black but he does not like Fossil or Timex. 
 Roli likes Blue, does not like Casio or Fastrack.
 Vihan is neither likes Pink nor a White, but Vihan likes Timex
 Uma likes Tissot and she likes Brown .
 Piyush likes to wear Fossil watch.

From the statement the one who likes white color likes Fastrack is possibly true for the one whose position is vacant in both watches and color and that is Anil.
So we can definitely say Anil likes to wear Fastrack and white color he likes. 
Now first separate the remaining variables , Yellow and Pink is left in color and Casio, Titan and Sonata watches are left in watches. 
As per given information Vihan does not like Pink that means its confirm he likes Yellow because we have only two varble left in color. And also Piyush likes Pink color. Tiya likes Orange color and she does not like Sonata i.e Tiya either likes Titan or Casio. As per given information i.e Roli, who likes Blue, does not like Casio or Fastrack and also does not like Titan means we have three variable left in the watches 
Out of which she neither likes Casio nor Titan so definitely she likes Sonata. 
So we can’t say which watch is likes by Sohan and Tiya they either likes Titan or Casio. Final arrangement is as follows:

Anil likes Fastrack. 

Lets separate the confirm conditions first so that we can easily find positions of given variables as follows: 
 Sohan likes Black but he does not like Fossil or Timex. 
 Roli likes Blue, does not like Casio or Fastrack.
 Vihan is neither likes Pink nor a White, but Vihan likes Timex
 Uma likes Tissot and she likes Brown .
 Piyush likes to wear Fossil watch.

From the statement the one who likes white color likes Fastrack is possibly true for the one whose position is vacant in both watches and color and that is Anil.
So we can definitely say Anil likes to wear Fastrack and white color he likes. 
Now first separate the remaining variables , Yellow and Pink is left in color and Casio, Titan and Sonata watches are left in watches. 
As per given information Vihan does not like Pink that means its confirm he likes Yellow because we have only two varble left in color. And also Piyush likes Pink color. Tiya likes Orange color and she does not like Sonata i.e Tiya either likes Titan or Casio. As per given information i.e Roli, who likes Blue, does not like Casio or Fastrack and also does not like Titan means we have three variable left in the watches 
Out of which she neither likes Casio nor Titan so definitely she likes Sonata. 
So we can’t say which watch is likes by Sohan and Tiya they either likes Titan 
or Casio. Final arrangement is as follows:
As per given information ‘Roli- Blue-Sonata’ combination is true. So answer is 3). 

Lets separate the confirm conditions first and we get:
Afzal sat on the immediate left of Ali and he is Reporter and second to the right of Rihan i. e Rihan , _, Afzal (Reporter), Ali. 
Right now we cant say the confirm position of Rihan.
Minal was fourth to the right of Rihan ,but not an immediate neighbor of Piyush or Afzal. Rihan, _, _,_, Minal.
Nazia is CS and an immediate neighbor of Rihan. 
Two diagram is possible that is:

 As Minal is not neighbour of Piyush and Piyush was sitting at the extreme right of the row.
So first fig is eliminated and the position of variables is confirmed. Salman in immediate right of Minal.
As Piyush is not an immediate neighbour of the one who is Doctor and nor himself so so neither Salman nor Piyush is a Doctor Finally we reached at conclusion Minal is a Doctor. As per given information Professor is third to the left CA/professor so Rihan is a Professor. Ali is either CA or Player and Piyush is a businessman. Final arrangement is as follows:

Rihan and Piyush pair sat at the ends of the row. So answer is 1).

Lets separate the confirm conditions first and we get:
Afzal sat on the immediate left of Ali and he is Reporter and second to the right of Rihan i. e Rihan , _, Afzal (Reporter), Ali. 
Right now we cant say the confirm position of Rihan.
Minal was fourth to the right of Rihan ,but not an immediate neighbor of Piyush or Afzal. Rihan, _, _,_, Minal.
Nazia is CS and an immediate neighbor of Rihan. 
Two diagram is possible that is:

 As Minal is not neighbour of Piyush and Piyush was sitting at the extreme right of the row.
So first fig is eliminated and the position of variables is confirmed. Salman in immediate right of Minal.
As Piyush is not an immediate neighbour of the one who is Doctor and nor himself so so neither Salman nor Piyush is a Doctor Finally we reached at conclusion Minal is a Doctor. As per given information Professor is third to the left CA/professor so Rihan is a Professor. Ali is either CA or Player and Piyush is a businessman. Final arrangement is as follows:

Rihan and Piyush pair sat at the ends of the row. So answer is 1).

Lets separate the confirm conditions first and we get:
Afzal sat on the immediate left of Ali and he is Reporter and second to the right of Rihan i. e Rihan , _, Afzal (Reporter), Ali. 
Right now we cant say the confirm position of Rihan.
Minal was fourth to the right of Rihan ,but not an immediate neighbor of Piyush or Afzal. Rihan, _, _,_, Minal.
Nazia is CS and an immediate neighbor of Rihan. 
Two diagram is possible that is:

 As Minal is not neighbour of Piyush and Piyush was sitting at the extreme right of the row.
So first fig is eliminated and the position of variables is confirmed. Salman in immediate right of Minal.
As Piyush is not an immediate neighbour of the one who is Doctor and nor himself so so neither Salman nor Piyush is a Doctor Finally we reached at conclusion Minal is a Doctor. As per given information Professor is third to the left CA/professor so Rihan is a Professor. Ali is either CA or Player and Piyush is a businessman. Final arrangement is as follows: