K, I, T, S, W, A, and N are sitting around a circular table facing the centre. N sits third to the left of A and N sits to the immediate right of W. Only K sits between N and I. Only one person sits between W and S. Who sits to the immediate right of T?

Given: 

K, I, T, S, W, A, and N are sitting around a circular table facing the centre.

N sits third to the left of A and N sits to the immediate right of W.

Only K sits between N and I.

Only one person sits between W and S.

W sits to the immediate right of T.

Thus, correct option is (a).