A cylindrical block of mass M and area of cross section A is floating in a liquid of density $$\rho$$ and with its axis vertical. When depressed a little and released the block starts oscillating. The period of oscillation is ___

A

$$2\pi \sqrt{\frac{M}{\rho Ag}}$$

B

$$\pi \sqrt{\frac{\rho A}{Mg}}$$

C

$$2\pi \sqrt{\frac{\rho A}{Mg}}$$

D

$$\pi \sqrt{\frac{2M}{\rho Ag}}$$