Two circular rings each of mass `M` and radius `R` are attached to each other at their rims and their planes perpendicular to each other as shown in figure. The moment of inertia of the system about a diameter of one of the rings and passing through the point of contanct is

Options

A. `3/2 MR^(2)`
B. `3/4MR^(2)`
C. `5/2MR^(2)`
D. `5/4MR^(2)`

Answer

C

Explanation

`I=2MR^(2)+(MR^(2))/2=(5MR^(2))/2`