Which of the following pair of persons are immediate neighbours?

We have, Z sits second to the right of X who sits on the smaller side of the table. Only two persons sit between Z and V. From the above condition, there are two possibilities. Case-1 Again we have, W sits second to the right of T. From the above condition, there are three possibilities. Case-2 Again we have, The number of persons sits between X and W is the same as the number of persons sit between W and S. The number of persons sits between U and S is one more than the number of persons sit between V and X when counted from the right of both U and V. From the above condition, case1 and case2 get eliminated. Case2a shows the final arrangement.