¿qué hora es? (12: 45)
o
a. son las doce menos cuarto.
o
b. es la una menos cuarto.
o
c. son las doce y media.
o
d. es la una y media,

The answer to your question is letter B.

Explanation:

A. Son las doce menos cuarto.

This answer is not correct because it saying that the hour is 11:45

B. Es la una menos cuarto.

This is the right answer because it says that the hour is 12:45

C. Son las doce y media.

This is not the right answer because it says that the hour is 12:30

D. Es la una y media

This is not the right answer because it says that the hour is 12:30