This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'The chief cells of the stomach secrete \nSelect and explain. \nA. Intrinsic factor, B. Hydrochloric acid, C. Pepsinogen, D. Gastrin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]