If $j,k,l$ are in AP $p,q,r$ in HP and $jp,kq,lr$ in $GP$ , then $\;\frac{p}{r}+\frac{r}{p}\;is\;equal\;to:$

Question

$(a)\;\frac{j}{l}+\frac{l}{j}\qquad(b)\;\frac{j}{l}-\frac{l}{j}\qquad(c)\;\frac{k}{q}+\frac{q}{k}\qquad(d)\;\frac{k}{q}-\frac{j}{p}$