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
[{'content': 'Pepsinogen is secreted by \nSelect and explain. \nA. Parietal cells, B. Mucus cells, C. Chief cells, D. Oxyntic cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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)', 'role': 'assistant'}]