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In a Delta ABC , " if " r1 = 2r2 = 3r3 ,...

In a `Delta ABC , " if " r_1 = 2r_2 = 3r_3 , ` then a : b = `

A

`3:5`

B

`5:3`

C

`4:5`

D

`5:4`

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The correct Answer is:
D
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