If the \( 7^{\text {th }} \) term of an H.P. is \( 1 / 10 \) and \( 12^{\text {th }} \) term is ...

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If the \( 7^{\text {th }} \) term of an H.P. is \( 1 / 10 \) and \( 12^{\text {th }} \) term is \( 1 / 25 \), then \( 20^{\text {th }} \) term, is
(A) \( \frac{1}{37} \)
(B) \( \frac{1}{41} \)
(C) \( \frac{1}{45} \)
(D) \( \frac{1}{49} \)
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