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:

• Correct answer
  A

  $\frac{181}{2}M{R}^2$
• B

  $\frac{19}{2} M{R}^2$
• C

  $\frac{55}{2}M{R}^2$
• D

  $\frac{73}{2}M{R}^2$

Hence, the correct answer is option: 'A'.