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: ENT
[{'content': 'Most common malignant tumour of minor salivary glands \nSelect and explain. \nA. Pleomorphic odenoma, B. Adenoid cystic carcinoma, C. Squamous cell carcinoma, D. Mucoepidermoid carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]