This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: ENT
[{'content': 'Which of the following malignant salivary gland tumours has a tendency for perineural invasion? \nSelect and explain. \nA. Mucoepidermoid carcinoma, B. Adenoid cystic carcinoma, C. Adenocarcinoma, D. Acinous cell carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Adenoid cystic carcinoma has a propensity to spread by perineural invasion. Depending on site most common nerves involved are maxillary and mandibular division of trigeminal.', 'role': 'assistant'}]