This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Salivary Glands, Subject name: Surgery
[{'content': 'All of the following are true about mucoepidermoid carcinoma except: \nSelect and explain. \nA. Most common radiation induced neoplasm of parotid, B. Most common malignant salivary gland tumor in children, C. Usually causes facial paralysis, D. Poorly differentiated in adults', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Mucoepidermoid carcinoma: Most common radiation induced neoplasm of parotid Most common malignant salivary gland tumor in children Types: Low grade type High grade type Well circumscribed mass having cystic mucinous material Mucin producing cells predominate Well-differentiated More Common in children TOC; Superficial or total parotidectomy Grossly infiltrative and has less tendency to cyst formation (hard tumor) Squamous cells predominate Poorly differentiated Less common TOC: Total parotidectomy +/- radical neck dissection', 'role': 'assistant'}]