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': 'Virus quantification is done by \nSelect and explain. \nA. Electron microscopy, B. Light microscopy, C. Plaque assay, D. Egg inoculation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Quantification assays : plaque and pock assay.', 'role': 'assistant'}]