A, B, C, D, E and F are sitting in a row. 'E' and 'F' are in the center and 'A' and 'B' are at the ends. 'C' is sitting on the-left of 'A'. Then who is sitting on the right of 'B'?

According to question,
We can draw a figure , in which E and F are in the centre and A and B are at the ends. C is sitting on the-left of A.
From given figure it is clear that , D is sitting on the right of B.
Sitting arrangement :-