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 the question, setting arrangement is at follow
'A' and 'B' are at the end then
B           A
'C' is sitting on the left of 'A' then
B       C   A
'E' and 'F' are in the center then arrangement will be
B D   E/F   F/E    C A
.   .     .     .  .
Clearly, D it sitting on the right of B.