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: Surgery
[{'content': 'Mucoepidermoid carcinoma of parotid arises from - \nSelect and explain. \nA. Secretory cells, B. Excretory cells, C. Myoepithelial cells, D. Myofibril', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]