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': 'In which one of the following conditions the Sialography is contraindicated? \nSelect and explain. \nA. Ductal calculus, B. Chronic parotitis, C. Acute parotitis, D. Recurrent sialadenitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sialography (Ptyalography, sialogram) is contraindicated in acute sialadenitis. Ref: Text Book of Radiology and Imaging By Sutton, 7th Edition, Page 535', 'role': 'assistant'}]