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The fourth, seventh and tenth terms of a...

The fourth, seventh and tenth terms of a G.P. are p,q,r respectively, then

A

`p^2 =q^2 + r^2`

B

`q^2 = pr`

C

`p^2 = qr`

D

`pqr + pq + 1 = 0`

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The correct Answer is:
B
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