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': 'Adenoid cystic carcinoma is also known as \nSelect and explain. \nA. Cylindroma, B. Pindborg tumor, C. Warthins tumor, D. Pleomorphic adenoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]