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': 'Parietal cell secretes \nSelect and explain. \nA. Mucus, B. Pepsinogens, C. Gastrin, D. Intrinsic factor', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Parietal cells located deep in the oxyntic glands secrete HCl & intrinsic factor. -Mucus is secreted by mucous neck cells of oxyntic glands. Pepsinogen is secreted by chief/peptic cells of oxyntic glands. -G cells of pyloric glands release hormone gastrin. Reference: Guyton,11e', 'role': 'assistant'}]