This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
[{'content': 'Most common malignant tumour of parotid is \nSelect and explain. \nA. Acinic cell carcinoma, B. Mucoepidermoid carcinoma, C. Squamous cell carcinoma, D. Adenocystic carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mucoepidermoid carcinoma is the most common malignant tumor of the parotid gland and can be divided into low-grade and high-grade tumorsRef: Sabiston, 20e, page no: 830', 'role': 'assistant'}]