If $\frac{1}{{p + q}},\;\frac{1}{{r + p}},\;\frac{1}{{q + r}}$ are in $A.P.$, then
If $\frac{1}{{p + q}},\;\frac{1}{{r + p}},\;\frac{1}{{q + r}}$ are in $A.P.$, then
- A
$p,\;,q,\;r$ are in $A.P.$
- B
${p^2},\;{q^2},\;{r^2}$ are in $A.P.$
- C
$\frac{1}{p},\;\frac{1}{q},\;\frac{1}{r}$ are in $A.P.$
- D
None of these
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- [KVPY 2012]
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