Two tuning forks A \& B produce notes of frequencies \( 256 \mathrm...

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Two tuning forks A \& B produce notes of frequencies \( 256 \mathrm{~Hz} \& 262 \mathrm{~Hz} \) respectively. An unknown note sounded at the same time as A produces beats. When the same note is sounded with B, beat frequency
\( \mathrm{P} \) is twice as large. The unknown frequency could be :
(A) \( 268 \mathrm{~Hz} \)
(B) \( 260 \mathrm{~Hz} \)
(C) \( 250 \mathrm{~Hz} \)
(D) \( 242 \mathrm{~Hz} \)
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