This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
Most common salivary gland involved by stone is 
Select and explain. 
A. Parotid, B. Submandibular, C. Minor, D. None
B: Submandibular
Answer: B: Submandibular 
Explanation: Eighty percent of all salivary stones occur in the submandibular gland, 10% occur in parotid, 7% in the sublingual and the remainder occurs in minor salivary glands" Eighty percent of submandibular stones are radio-opaque and can be identified on plain radiographs. In contrast parotid stones are usually radiolucent and rarely visible on plain radiography. Ref : Bailey & Love 25/e p755