Which of the following statements are wrong about the velocity of sound in air:
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Velocity of sound and air is given by,

$v _{\text {air }}=\sqrt{\frac{\gamma_{\text {air }} R T}{ M }}$ (option 'A' and 'B' are not true for sound of velocity in air)

$v_{\text {wzeter }}=\sqrt{\frac{\gamma_{\text {water }}}{\rho}}$ (option ' $C$ ' and ' $D$ ' are not true for sound of velocity in air as air has more weight than moist air for same density of molecules) All are wrong.

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