The wages of three labourers A, B and C are in the ratio 10:12:15. As wage is increased in the ratio 5:6, B's wage is increased in the ratio 3:4 and C's wage is increased in the ratio 3:5. The new ratio of the wages of A:B:C is ............

A

15 : 18 : 20

B

12 : 16 : 25

C

6 : 7 : 9

D

8 : 6 : 5