In a school, the total students (boys and girls only) are 720. Boys and girls are in the ratio 7 : 5. In another school, there are 560 students (boys and girls only) and the ratio of boys and girls is 3 : 5. The ratio of boys and girls in the total strength of the two schools is:

A

65 : 63

B

60 : 63

C

63 : 65

D

65 : 60