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': 'Treatment of choice for stone in Submandibular duct compressing distal to Lingual nerve is \nSelect and explain. \nA. Submandibular excision, B. Antibiotics, C. Intraoral removal, D. Observe', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Distal Stones are removed by intraoral method.\nProximal stones are removed by submandibular excision.', 'role': 'assistant'}]