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': 'Intrinsic factor in stomach is secreted by \nSelect and explain. \nA. Parietal cells, B. Chief cells, C. Zymogen cells, D. Enterochromaffin cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In the body of the stomach, including the fundus, the glands also contain parietal (oxyntic) cells,which secrete hydrochloric acid and intrinsic factor, and chief (zymogen, peptic) cells, which secrete pepsinogens Ref: guyton and hall textbook of medical physiology 12 edition page number:406,407,408', 'role': 'assistant'}]