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': 'Electron microscopy is helpful in diagnosis of - \nSelect and explain. \nA. Rotavirus, B. RSV, C. Herpesvirus, D. Prion', 'role': 'user'}, {'content': "Answer: A \nExplanation: Laboratory diagnosis of rotavirus include electron microscooy and immunielectron microscopy-these are expensive and comolicated procedures.concentration of more than 10^6 paicles per ml are necessary for the virus to be seen in feces by elwctron microscopy. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:561", 'role': 'assistant'}]