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Question

Assertion :The small intestine of human is the longest portion in the alimentary canal. Reason: Absorption of digested food requires a very large surface area.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
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
The small intestine is about 6 m (20 feet) long. It is coiled in the center of the abdominal cavity. The small intestine is divided into 3 sections: duodenum, jejunum, and ileum. The lining of the small intestine secretes a hormone called secretin which stimulates the pancreas to produce digestive enzymes. The small intestine is where the most extensive part of digestion occurs. Most food products are absorbed in the small intestine.

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