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
Treatment of choice for stone in Submandibular duct compressing distal to Lingual nerve is 
Select and explain. 
A. Submandibular excision, B. Antibiotics, C. Intraoral removal, D. Observe
C: Intraoral removal
Answer: C: Intraoral removal 
Explanation: Distal Stones are removed by intraoral method.
Proximal stones are removed by submandibular excision.