A light cylindrical vessel is kept on a horizontal surface. Area of the base is $$A$$. A hole of cross-sectional area $$a$$ is made just at its bottom side. The minimum coefficient of friction necessary to prevent sliding the vessel due to the impact force of the emerging liquid is

A

$$\frac{A}{2a}$$

B

None of these

C

$$\frac{2a}{A}$$

D

$$\frac{a}{A}$$