AIIMS 2019 Zoology Digestive System Assertion Reason Question
Assertion: Cholecystokinin is released by duodenum.
Reason: It activates pepsinogen and bile juice.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Option C is correct because the assertion that cholecystokinin (CCK) is secreted by cells in the duodenum is true, while the reason stating that pepsinogen is activated by hydrochloric acid (HCl) and not by CCK is false. Pepsinogen is indeed activated by HCl in the stomach, but CCK primarily stimulates the release of digestive enzymes from the pancreas and bile from the gallbladder, not the activation of pepsinogen. Options A and B are incorrect because they misinterpret the relationship between the assertion and the reason; thus, they cannot both be true or both be false.
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