Which statement is correct?

a. In 2/4 time signature, there are four beats in a measure and a half note receives one beat

b. In 3/4 time signature, there are three beats in a measure and a half note receives three beats.

c. In 4/4 time signature, there are four beats in a measure and a quarter note receives one beat

d. in 6/8 time signature. there are six beats in a measure and a quarter note receives one beat