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': 'Sialolithiasis is most commonly seen in \nSelect and explain. \nA. Submandibular, B. Parotid, C. Sublingual, D. Minor salivary gland', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]