This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Salivary Gland), Subject name: Surgery
[{'content': 'Investigation using dye to find out stone in salivary gland - \nSelect and explain. \nA. MR angiography, B. USG, C. Mammography, D. Sialography', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Sialographyo Sialography is sthe standard investigation to detect stone in a salivary gland in which a dye is injected through the duct.", 'role': 'assistant'}]