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Let a, b and c be the 7th, 11th and 13th...

Let a, b and c be the 7th, 11th and 13th terms respectively of a non-constant AP. If these are also the three consecutive terms of a GP, then `(a)/(c)` is equal to

A

2

B

`1//2`

C

`7//13`

D

4

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The correct Answer is:
D
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