AIIMS 2018 Physics Forces Assertion Reason Question

The assertion that friction force is a non-conservative force is true; however, the reason provided is false because it incorrectly states that both assertion and reason are false. In fact, the assertion is true, making option D correct as it accurately reflects that the reason is false. Options A and B are incorrect because they incorrectly classify the truth of the assertion and reason, while option C is incorrect since it implies that the reason is false but does not address the assertion's truthfulness. Understanding that friction is a non-conservative force is crucial, as it dissipates mechanical energy as heat, unlike conservative forces, which conserve mechanical energy.