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: Microbiology
[{'content': '8 Year old boy presented with swelling on both\nsides of the face, below the ears of 4 days duration.\nIt first started on the left side and then 3 days later on the right side\n\nPossible diagnosis will be \nSelect and explain. \nA. Bacterial sialadenitis, B. Sialadenosis, C. Epidemic parotitis, D. Sialadenitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]