Moment of inertia of a thin rod of mass 'M' and length 'L' about the axis perpendicular to the rod and passing through its centre is ............

A

$$\frac{ML^2}{4}$$

B

$$\frac{ML^2}{6}$$

C

$$\frac{ML^2}{12}$$

D

$$\frac{ML^2}{2}$$