Assertion: If acceleration of a particle moving in a straight line varies as \( a \propto t^{n} ...

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Assertion: If acceleration of a particle moving in a straight line varies as \( a \propto t^{n} \), then \( s \propto t^{n+2} \).
Reason: If \( a-t \) graph is a straight line, then \( s-t \) graph may be a parabola.
(1) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(2) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
(3) If Assertion is correct but Reason is incorrect.
(4) If Assertion is incorrect but Reason is correct.
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