Seven people, A, B, C, D, E, F and G, are sitting in a straight row, facing the north. Only two people sit to the right of D. Only two people sit to the left of C. Only two people sit between D and G. Only three people sit between C and E. A is not an immediate neighbour of D. B sits to the right of D. Who sits at the centre?

Given, Seven people  A, B, C, D, E, F and G are sitting in a row facing north.

1) Only two people sit to the right of D and Only two people sit to the left of C.

Thus D will be third from the right end and C will be third from the left end.

2) Only two people sit between D and G, then it is only possible when G will be to the left of D.

3) Only three people sit between C and E, then it is only possible when E will be to the right of C.

4) A is not an immediate neighbour of D, then there is only one place left for A,  i.e. extreme left of the row.

5) B sits to the right of D, then B will take only space left between D and E.

6) Now there is only one space left and it will be taken by F.

Hence, the correct answer is "F".