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Assertion: If acceleration of a particle moving in a straight line varies as `a prop t^n` then `s prop t^(n+2)` . Reason: If `a-t` graph is a straight line,then `s-t` graph may be a

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Assertion: If acceleration of a particle moving in a straight line varies as `a prop t^n` then `s prop t^(n+2)` .
Reason: If `a-t` graph is a straight line,then `s-t` graph may be a parabola.
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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