Q. Assertion : No real body is truly rigid.
Reason : A rigid body is a body with a perfectly definite and unchanging- shape. The distances between different pairs of particles of such a body do not change.

 1597  218 System of Particles and Rotational Motion Report Error

Solution:

It is evident from the second statement that no real body is truly rigid, since real bodies deform under the influence of forces. But in many situations the deformations are negligible.