Question

—¿________ es tu cumpleaños?

—Mi cumpleaños es el 17 de mayo.

Qué
Cuándo
Dónde
Cómo

I think it is A. Please confirm, it would be very helpful.

Answer 1

i think it would be cuando which is B.

Step-by-step explanation:

if you use cuando it would be "cuando es tu cumpleanos.