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Assertion: An object may have varying speed without having varying velocity. Reason: If the velocity is zero at an instant, the acceleration is zero at that

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Assertion: An object may have varying speed without having varying velocity.
Reason: If the velocity is zero at an instant, the acceleration is zero at that instant.
Options:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false and R is also false.

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