This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Salivary Gland, Subject name: Surgery
[{'content': 'Salivary gland stone is most common in which salivary gland? \nSelect and explain. \nA. Parotid gland, B. Submandibular gland, C. Sublingual gland, D. Minor salivary gland', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' i.e., Submandibular gland * Eighty per cent of all salivary stones occur in the submandibular glands because their secretions are highly viscous.* Eighty per cent of submandibular stones are radio-opaque and can be identified on plain radiography", 'role': 'assistant'}]