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
The chief cells of the stomach secrete 
Select and explain. 
A. Intrinsic factor, B. Hydrochloric acid, C. Pepsinogen, D. Gastrin
C: Pepsinogen
Answer: C: Pepsinogen 
Explanation: .