This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral cavity & Oesophagus, Subject name: ENT
[{'content': 'salivary calculus is most common in which salivary gland? \nSelect and explain. \nA. Submandibular, B. Sublingual, C. Parotid, D. Minor salivary glands', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Salivary calculi Calculi may form in the ducts of the submandibular or parotid glands They are formed by the deposition of calcium phosphate on the organic matrix of mucin or cellular debris About 90% of the stones are seen in the submandibular and 10% in the parotid glands Stones may form in the duct or parenchyma of the gland. Ref: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 260 - 261', 'role': 'assistant'}]