Five friends X, Y, Z, A, and B are sitting in a circle facing the centre. X is to immediate left of Y and to the immediate right of Z. B is to the immediate right of A. Who is to the immediate left of A?

Y

In a circle, if the positions are named as follows - 

1. X is to immediate left of Y and to the immediate right of Z

2. B is to the immediate right of A.

Thus, Y is to the immediate left of A.