Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — A is false but R is true
Concept & Option Breakdown
Standard Reference VerifiedAssertion (A) is false: Protein digestion begins in the stomach, where pepsin converts proteins into proteoses and peptones. It continues in the small intestine via pancreatic proteases (trypsin, chymotrypsin, carboxypeptidase) and intestinal brush-border peptidases. Reason (R) is true: The pancreas secretes inactive zymogens (trypsinogen, chymotrypsinogen, procarboxypeptidase) into the duodenum, where they become active enzymes to digest proteins.
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