S, T, U, V, W, X and Y are sitting around a circle facing at the centre. V is third to the left of U, who is second to the left of S.  T is third to the left of V and second to the right of W.  X is not an immediate neighbor of S. In which of the following pairs the second person is sitting to the immediate right of the first person ?

U W T U X W S T

X W