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
[{'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 sialoadenitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sialography is contraindicated in acute sialadenitis (includes parotitis) for fear of exacerbating the condition." Sialography Is the contrast x-ray examination of the salivary ducts and glands Also k/a ptyalography', 'role': 'assistant'}]