If \( x=3 \) is the chord of contact of the circle \( x^{2}+y^{2}=8...

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If \( x=3 \) is the chord of contact of the circle \( x^{2}+y^{2}=81 \), then the equation of the corresponding pair of tangents, is
\( \mathrm{P} \)
(A) \( x^{2}-8 y^{2}+54 x+729=0 \)
(B) \( x^{2}-8 y^{2}-54 x+729=0 \)
(C) \( x^{2}-8 y^{2}-54 x-729=0 \)
(D) \( x^{2}-8 y^{2}=729 \)
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