Assertion : Cardiac muscles can work throughout life. Reason:they are present in heart
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Assertion : There is no mixing of oxygenated and deoxygenated blood in the human heart. Reason : Valves are present in the heart which allows the movement of blood in one direction only. ... The backflow of the blood is prevented by the presence of valves.
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both assertion and reason are correct, but reason is not the correct explanation of assertion
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