If \[a,\ b,\ c,\ d\] be in H.P., then – McqOptions

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1.	If \[a,\ b,\ c,\ d\] be in H.P., then
A.	\[{{a}^{2}}+{{c}^{2}}>{{b}^{2}}+{{d}^{2}}\]
B.	\[{{a}^{2}}+{{d}^{2}}>{{b}^{2}}+{{c}^{2}}\]
C.	\[ac+bd>{{b}^{2}}+{{c}^{2}}\]
D.	\[ac+bd>{{b}^{2}}+{{d}^{2}}\]
Answer» D. \[ac+bd>{{b}^{2}}+{{d}^{2}}\]

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