If \( \mathrm{p}, \mathrm{q} \) are the segments of a focal chord of an ellipse \( \mathrm{b}^{2...

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If \( \mathrm{p}, \mathrm{q} \) are the segments of a focal chord of an ellipse \( \mathrm{b}^{2} \mathrm{x}^{2}+\mathrm{a}^{2} \mathrm{y}^{2}=\mathrm{a}^{2} \mathrm{~b}^{2}(ab) \), then
(A) \( a^{2}(p+q)=2 b p q \)
(B) \( b^{2}(p+q)=2 a(p q) \)
\( P \)
(C) \( a(p+q)=2 b^{2} p q \)
(D) \( b(p+q)=2 a^{2} p q \)
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