Solutions
Seven people S, F, A, G, D, H, and T are sitting in a straight row, facing north.
1. Only two people sit to the right of G.
2. G is the immediate neighbour to F and H

3. F is third to the right of A.

4. S is the immediate neighbour to D and A.
The above condition cannot be satisfies in Case II, so it is eliminated.

Clearly, T sits at the extreme right of the row.
Hence, 'T' is the correct answer.