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: Pathology
[{'content': "Mucin is not secreted by \nSelect and explain. \nA. Goblet cell, B. Paneth cell, C. Brunner's gland, D. Crypts of Lieberkuhn", 'role': 'user'}, {'content': "Answer: B \nExplanation: Paneth cells are a specific type of cell within the crypts of Lieberkuhn.\nThese cells have atypically oriented bright eosinophilic granules containing a variety of antimicrobial proteins and\xa0play a role in mucosal immunity (and not mucin secretion)\n\nBrunner's glands:\xa0are sub-mucosal mucus gland within the duodenum.\nGoblet cells:\xa0are mucin-secreting cells.\nCrypts of Lieberkuhn:\xa0are lined by goblet cells besides other cell types.\n\nThese are thus also involved in mucin secretion.", 'role': 'assistant'}]