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If a, b, c, are in A. P, and (b−a), (c−b...

If a, b, c, are in A. P, and (b−a), (c−b), a are in G.P, then a : b : c is

A

`1 : 2 : 3`

B

`3 : 2 : 1`

C

`2 : 3 : 4`

D

None of these

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