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In any triangle ABC, if a : b : c=2 : 3 ...

In any triangle ABC, if `a : b : c=2 : 3 : 4`, then `R : r=`

A

`8 : 3`

B

`16 : 9`

C

`5 : 16`

D

`16 : 5`

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The correct Answer is:
D
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