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 these digestive enzymes is NOT present in pancreatic juice? \nSelect and explain. \nA. Elastase, B. Colipase, C. Ribonuclease, D. Enteropeptidase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Principal digestive enzymes', 'role': 'assistant'}]