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': 'Goblet cells secrete \nSelect and explain. \nA. HCI, B. Pepsin, C. Mucus, D. Serolonin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Apa from comprising the epithelial lining of various organs, production of large glycoproteins and carbohydrates, the most impoant function of goblet cells is the secretion of mucus. This mucus is a gel-like substance that is composed mainly of mucins, glycoproteins, and carbohydrates.Ref: <a href="', 'role': 'assistant'}]