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': "All are true about parotid fistula except \nSelect and explain. \nA. Complication of superficial parotidectomy, B. Treated with Newman and sea Brock's operation, C. Internal fistula are symptomatic, D. IOC is Sialogram", 'role': 'user'}, {'content': "Answer: C \nExplanation: Internal Fistulas are that open inside mouth and are Asymptomatic.\nExternal Fistulas are 2 types -\n\t\n(i) Gland fistula\n(ii) Duct fistula\n\n\nTreated with New man and Sea brock's operation.", 'role': 'assistant'}]