Three identical spherical shells, each of mass m and radius r are placed as shown in figure. Cons...

Three identical spherical shells, each of mass m and radius r are placed as shown in figure. Consider an axis X X^' which is touching two shells and passing through diameter of third shell.
Moment of inertia of the system consisting of these three spherical shells about X X^' axis is
(a) 4 m r^2
(b) 11/5 m r^2
(c) 3 m r^2
(d) 16/5 m r^2

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