ZP-->Q : ZP is unique hence hence Obviously ZP-->Q is a Functional Dependency for the instance.
Y-->X : There are 2 B2 in Y but both does not correspond to same 'X' [2nd and 3rd row] So Fail for Functional Dependency.
YZ-->P : There are B2,C2(Y,Z) two times but these combination does not correspond to same 'P'.[3rd and 5th row]
So,A is the correct answer.