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': 'Calculi is most commonly seen in: \nSelect and explain. \nA. Minor salivary gland, B. Major salivary gland, C. Parotid gland, D. Sublingual gland', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sialolithiasis is accumulation of obstructive calcifications within the glandular ductal system, more common in submandibular gland (90%) than the parotid gland (10%).', 'role': 'assistant'}]