A) 2
B) \[\frac{pq}{p+q}\]
C) \[\frac{p+q}{pq}\]
D) None of these
Correct Answer: A
Solution :
As given \[H=\frac{2pq}{p+q}\] \[\therefore \ \ \frac{H}{p}+\frac{H}{q}=\frac{2q}{p+q}+\frac{2p}{p+q}=\frac{2\,(p+q)}{p+q}=2\].
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