If \[a,\ b,\ c\] are in H.P., then the value of \[\left( \frac{1}{b}+\ – McqOptions

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1.	If \[a,\ b,\ c\] are in H.P., then the value of \[\left( \frac{1}{b}+\frac{1}{c}-\frac{1}{a} \right)\,\left( \frac{1}{c}+\frac{1}{a}-\frac{1}{b} \right)\], is[MP PET 1998; Pb. CET 2000]
A.	\[\frac{2}{bc}+\frac{1}{{{b}^{2}}}\]
B.	\[\frac{3}{{{c}^{2}}}+\frac{2}{ca}\]
C.	\[\frac{3}{{{b}^{2}}}-\frac{2}{ab}\]
D.	None of these
Answer» D. None of these

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