This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
Pepsinogen is secreted by 
Select and explain. 
A. Parietal cells, B. Mucus cells, C. Chief cells, D. Oxyntic cells
C: Chief cells
Answer: C: Chief cells 
Explanation: Chief or zymogen or peptic cells secrete pepsiongens.Parietal or oxyntic cells secrete HCl and intrinsic factor.These cells are located in the body of stomach, including the fundus.(Ref: Ganong&;s Review of medical physiology, 23 rd edition, page 431)