Resonance With Tuning Fork

Resonance is a special case of forced vibrations. When the frequency of an externally applied periodic force on a body is equal to its natural frequency, the body readily begins to vibrate with an increased amplitude. This phenomenon is known as resonance. The vibrations of large amplitude are called resonant vibrations.

With which of the following frequencies does a tuning fork of $256\text{ Hz}$ resonate?

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