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
[{'content': 'Which of the following is NOT present in pancreatic juice? \nSelect and explain. \nA. Colipase, B. Elastase, C. Ribonuclease, D. Aminopeptidase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Aminopeptidase is present in succus entericus; it is an exopeptidase. The exopeptidase present in pancreatic juice is carboxypeptidase.', 'role': 'assistant'}]