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': 'Rotavirus infection is diagnosed by the presence of - \nSelect and explain. \nA. Antigen in stool by ELISA, B. Virus in stool, C. Antigen in blood, D. AB', 'role': 'user'}, {'content': 'Answer: D \nExplanation: daignisis of rota virus by drminstration if virus instool&antigenic group by ELISA REF:ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.561', 'role': 'assistant'}]