A, B, R, D, I, S, and T are sitting around a circular table facing away from the circle. A does not sit adjacent to I and T. B does not sit adjacent to A. R sits fourth to the left of A. D and B sit adjacent to each other. S sits third to the left of I. Who is the immediate neighbour of both T and A?

A, B, R, D, I, S, and T are sitting around a circular table facing away from the circle.

R sits fourth to the left of A. B does not sit adjacent to A. A does not sit adjacent to I and T.

From the above-given conditions, we can say that Only D and S can be the immediate neighbours of A.

These are given below in Case(i) and Case(ii).

D and B sit adjacent to each other.

S sits third to the left of I.

In Case(i), I is not possible as per the above-given condition. So this case is eliminated.

Now only T is remaining which can be placed on the blank space.

According to the above arrangement, S is the immediate neighbour of both T and A.