NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

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Pacemaker in heart is situated

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Correct option: B

In the wall of right atrium

Option B (In the wall of right atrium) is correct because the sinoatrial (SA) node, which acts as the heart's natural pacemaker, is located in the wall of the right atrium.

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{O^ - }

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