Seven identical circular planar disks, each of mass M and radius R are welded symmetrically as shown. The moment of inertia of the arrangement about the axis normal to the plane and passing through the point P is:

A

$$\frac{181}{2}MR^2$$

B

$$\frac{19}{2}MR^2$$

C

$$\frac{55}{2}MR^2$$

D

$$\frac{73}{2}MR^2$$