This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Trypsin is an activator of all of the following enzymes EXCEPT 
Select and explain. 
A. Chymotrypsinogen, B. Pepsinogen, C. Proelastase, D. Procolipase
B: Pepsinogen
Answer: B: Pepsinogen 
Explanation: Actions of trypsin: 

Digestion of proteins
Curdling of milk
Once formed, itself converts trypsinogen into trypsin (autocatalytic action)
Conversion of chymotrypsinogen into chymotrypsin
Polycarboxypeptidses into carboxypeptidase.