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': 'Salivary calculus is more common in \nSelect and explain. \nA. Submandibular gland, B. Sublingual gland, C. Parotid gland, D. Minor salivary gland', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]