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In a triangle A B C , if a : b : c=4:5:6...

In a triangle `A B C ,` if `a : b : c=4:5:6` , then ratio between its circumradius and inradius is

A

`8:7`

B

`3:2`

C

`7:3`

D

`16:7`

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The correct Answer is:
D
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