NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

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Statement-A : First heart sound is Lub.
Statement-B : Dub sound is produced due to closure of semilunar valves.

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Correct option: D

Both statements are correct

Option D (Both statements are correct) is correct because the first heart sound (Lub) is produced by the closure of the tricuspid and bicuspid valves, and the second heart sound (Dub) is produced by the closure of the semilunar valves.

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