Assertion: Newton’s first law is not universally valid.
Reason: Newton’s first defines an inertial frame.

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Assertion is True, Reason is True but Reason is not correct explanation of Assertion

Assertion is True, Reason is False

Assertion is True, Reason is True and Reason is correct explanation of Assertion

Assertion is False, Reason is True

answer is A.

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Detailed Solution

Newton's first law of motion defines an inertial frame of reference which tells that a body remains at rest to a frame or in a motion with respect to a frame unless any external force doesn't applied on it. The frame can be at rest or can move with constant velocity.

Newton's 1st law are valid only in inertial frame of reference.

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