How many persons sit to the right of X?
The person, who faces R, sits third to the right of Q. Only one person sits between Q and W. Case-2 Case-4 V sits second to the right of P, where neither of them faces Q nor sits on the extreme ends of the row. S sits on the extreme end of the row but doesn’t face R. Here, cases 2 and 3 get eliminated. Case-1 Only one person sits between A and U, who neither sits adjacent to S nor Q. Z sits to the right of X but neither faces S and A nor sits on the extreme ends of the row. Here, case 1 gets eliminated.