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': 'Paneth cells contain - \nSelect and explain. \nA. Zinc, B. Copper, C. Molybdenum, D. Selenium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Paneth cells are zinc-containing cells widely distributed in Lieberkuhn's crypts of the intestine in a variety of species.\nThese cells have atypically oriented bright eosinophilic granules containing a variety of antimicrobial proteins and play a role in mucosal immunity (and not mucin secretion).\nThe principal defence molecule secreted by Paneth cells are alpha-defensins.\nIn addition to defensins, Paneth cells secrete lysozyme, TNF- α, and phospholipase-A2.", 'role': 'assistant'}]