Assertion :Blood coagulates in the injured blood vessels. Reason: Uninjured blood vessels release an anticoagulant heparin.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Blood coagulation starts after certain factors are released by tissues at the site of injury. In injured blood vessels, the uninjured walls of the same surrounding the site of injury release anticoagulants such as heparin.
So, the assertion and reason are both correct and reason is the correct explanation of the assertion.

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