This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'Viral plaque is made in lab for - \nSelect and explain. \nA. Quantitative assay of infectivity of virus, B. Diagnosis of virus, C. Qualitative assay of infectivity of virus, D. Type of virus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Quantitative assays measure the actual number of infectious paicles in the inoculum includes 2 methods-plaque assay and pock assay. REF:ANATHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 8TH EDITION PAGE NO:437", 'role': 'assistant'}]