A long cylinderical glass vessel has a small hole of radius r at its bottom. The depth to which the vessel can be lowered vertically in a deep water (surface tension S) without any water entering inside is
A. `(4S)/(r rho g)`
B. `(3S)/(r rho g)`
C. `(2 S)/(r rho g)`
D. `(S)/(r rho g)`
