Assertion
Beta cells regulate the blood sugar level.
Reason
Beta cells secrete insulin.

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.
Insulin is a peptide hormone produced by beta cells in the pancreas. It regulates the metabolism of carbohydrates and fats by promoting the absorption of glucose from the blood to skeletal muscles and fat tissue. Hence, it regulate the blood sugar level.
Thus, the correct answer is option A.

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Assertion Beta cells regulate the blood sugar level.ReasonBeta cells secrete insulin.

Assertion
Beta cells regulate the blood sugar level.
Reason
Beta cells secrete insulin.