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If the roots of the equation \( \frac{1}{x+p}+\frac{1}{x+q}=\frac{1}{r} \) are equal in
\( \mathrm{P} \) magnitude but opposite in sign, then the product of the

W) roots is:
(a) \( -2\left(p^{2}+q^{2}\right) \)
(b) \( -\left(p^{2}+q^{2}\right) \)
(c) \( -\frac{\left(p^{2}+q^{2}\right)}{2} \)
(d) \( -p q \)
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