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': 'All of the following statement regarding stones in the submandibular gland are true except: March 2008 \nSelect and explain. \nA. 80% of stones occur in the submandibular gland, B. Majority of submandibular stones are radio-lucent, C. Stones are the most common cause of obstruction within the submandibular gland, D. Patient presents with acute swelling in the region of the submandibular gland', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Majority of submandibular stones are radio-lucent', 'role': 'assistant'}]