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JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Assertion: Parallax method is used for measuring distances of nearby stars only.
Reason: With increase of distance of star, parallactic angle becomes too small to be measured accurately.

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Correct option: A

If both assertion and reason are true and reason is the correct explanation of assertion

Option A (If both assertion and reason are true and reason is the correct explanation of assertion) is correct because the parallax method is limited to nearby stars due to the decreasing parallactic angle with increasing distance, making accurate measurement difficult.

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