A glass tube $1.5\;m$ long and open at both ends is immersed vertically in a mind tank completely. A tuning fork of $600\;Hz$ is vibrated and kept at the upper end of tube and tube in gradually raised out of water. The total number of resonances heard before when the tube comes out of water, taking $v = 330\;m/s$ :

Question

( A ) 8
( B ) 6
( C ) 12
( D ) 4