A uniform cylinder of length L and mass M having cross-sectional area A is suspended, with its length vertical, from a fixed point by a massless spring such that it is half submerged in a liquid of density `sigma` at equilibrium position. The extension `x_0` of the spring when it is in equlibrium is:

Options

A. `Mg / k`
B. `Mg / k (1- LA sigma / M)`
C. `Mg / k (1- LA sigma /2 M)`
D. `Mg / k (1+ LA sigma / M)`