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': 'Carcinoma Ex pleomorphic adenoma is \nSelect and explain. \nA. Malignant change of pleomorphic adenoma, B. Regrowth of pleomorphic adenoma after superficial parotidectomy due to inadquate removal, C. Painless condition, D. Slow and progressive growth of pleomorphic adenoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Carcinoma Ex pleomorphic Adenoma / Malignant mixed tumour\n\nMalignant change of pleomorphic adenoma\nHas rapid growth and painful\nLeads to paraesthsia and facial weakness.', 'role': 'assistant'}]