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: Pathology
[{'content': 'Eighty percent of all salivary stones occur in \nSelect and explain. \nA. Parotid, B. Submandibular, C. Sublingual, D. Minor salivary glands', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]