This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Mucin is secreted by? \nSelect and explain. \nA. Skin, B. Lung, C. Stomach, D. Gall bladder', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Gall bladderSecretion of Mucin:Secretes mucin adding to bile.During intestinal release of bile, mucin acts as lubricant. Aids in intestinal movement of chyme.', 'role': 'assistant'}]