Five persons: A, B, C, D, E
1) A sits at the centre.
2) Neither B nor C are immediate neighbours of A.
(This means B and C sit at either of the ends)
3) E is the immediate neighbour of one who sits at the extreme right end.
(Therefore, E sits immediately right of A. This also implies that D sits immediately left of A)
4) D is not an immediate neighbour of B.
(This means C sits at the left end and B sits at the right end)
This is the final seating arrangement.
Hence, D sits immediately left of A.