Concept:The duodenum is the site where pancreatic enzymes become active.
Explanation:Trypsin is secreted by the pancreas in the inactive form, trypsinogen.
In the duodenum, trypsinogen is converted into active trypsin.
This active trypsin digests proteins in the small intestine.
Pepsin and renin are active in the stomach.
Amylase begins starch digestion in the mouth.
Hence, among the options, trypsin is the enzyme specifically activated in the duodenum.
Answer:C. Trypsin