If the $2^{\text {nd }}, 5^{\text {th }}$ and $9^{\text {th }}$ terms of a non-constant A.P. are in G.P., then the common ratio of this G.P.is
$\frac{7}{4}$
$\frac{8}{5}$
$\frac{4}{3}$
1
Correct Option:
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