Assertion :During a turn, the value of centripetal force should be less than the limiting frictional force. Reason: The centripetal force is provided by the frcitional force between the tyres and the road
During a turn, Centripetal force =mv2r this force is provided by friction force =μN. Thus, for the body to balance, Centripetal force ≤μN which is the limiting frictional force. Hence, assertion and reason are correct and reason is the correct explanation.