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If a : b = 2 : 3, b : c = 3 : 4, c : d =...

If a : b = 2 : 3, b : c = 3 : 4, c : d = 4 : 5, find a : b : c : d.

A

`5 : 4 : 3 : 2`

B

`30 : 20 : 15 : 12`

C

`2 : 3 : 4 : 6`

D

`2 : 3 : 4: 5`

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The correct Answer is:
D
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