This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal System, Subject name: Physiology
Which of the following is NOT present in pancreatic juice? 
Select and explain. 
A. Colipase, B. Elastase, C. Ribonuclease, D. Aminopeptidase
D: Aminopeptidase
Answer: D: Aminopeptidase 
Explanation: Aminopeptidase is present in succus entericus; it is an exopeptidase. The exopeptidase present in pancreatic juice is carboxypeptidase.