A tuning fork of fequency 330 Hz resonates with an air column of length 125 cm in a cylindrical tube, in the fundamental mode. When water is slowly poured in it, the minimum height of water required for observing resonance once again is
(Velocity of sound 330 `ms^(-1)`)

Options

A. 75 cm
B. 60 cm
C. 50 cm
D. 30 cm

Explanation

Data is improper.