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If a : b = 2/9 : 1/3, b : c = 2/7 : 5/14...

If `a : b = 2/9 : 1/3, b : c = 2/7 : 5/14` and `d : c = 7/10 :3/5`,then find `a : b : c : d`

A

`4:6:7:9:8`

B

`16:24:30:35`

C

`8:12:15:7`

D

`30:35:24:16`

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The correct Answer is:
B
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