A: Alveoli are the balloon like structure which increase surface area for absorption of digested food. R :The membrane of the Alveoli is stretchable. *
1. Assertion and Reason both are correct and reason is the correct explanation of assertion.
2. Assertion and Reason both are correct and reason is not the correct explanation of assertion.
3. Assertion is correct but reason is incorrect
4. Assertion is incorrect but reason is correct
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4. Assertion is incorrect but reason is correct
Explanation:
because alvioli doesnot absorb digestet food
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