In a resonance tube experiment, a closed organ pipe of length `120cm` is used. Initially it is completely filled with water. It is vibrated with tuning fork of frequency `340 Hz`. To achieve resonaance the water level is lowered then (given `V_(air) = 340 m//sec`., neglect end correction) :
A. minimum length of water column to have the resonance is `45 cm`.
B. the distance between two successive nodes is `50 cm`.
C. the maximum length of water column to create the resonance is `95 cm`.
D. the distance between two successive nodes in `25 cm`.
