The seats for Mathematics, English and Chemistry in a school are in the ratio of 6 : 4 : 7. If these seats are increased by 20%, 40% and 60%, respectively, the ratio of the increased seats is:

A

9 : 7 : 8

B

9 : 7 : 14

C

1 : 2 : 3

D

7 : 9 : 14