Assertion: Rolling without slipping cannot possible in absence of friction.
Reason: During rolling without slipping, energy can remain conserved in absence of external applied force.
(4)
In uniform pure rolling, the linear velocity is constant. If no external force or torque is applied, the body will remain in a state of uniform pure rolling. In this case, the friction force is always zero, so there will not be any effect of the frictional force on the body.