Four of the following five are related to each other in some way and thus formed a group. Choose the one which does not belong to that group?

Answer the questions based on the information given below. Ten people O, P, Q, R, S, T, U, V, W and X are seated in two parallel rows such that five persons are seated in each row but not necessarily in the same order. Persons seated in row 1 are facing towards the east direction while persons seated in the row 2 are facing towards the west direction. Therefore, in the given seating arrangement persons seating in row 1 are facing and sitting opposite to the persons seating in row 2 and vice versa. X sits at one of the extreme ends and sits three places away from the one who faces S. P faces the one who sits to the immediate left of S. Only one person sits between P and T, who faces Q. U sits second to the left of Q and is sitting adjacent to the one who faces R. T is not sitting adjacent to R. Neither O nor V sits at the extreme ends. V neither faces west nor sits adjacent to U.