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': 'Among the given viruses, which is best cultivated from urine? \nSelect and explain. \nA. Rubella, B. Norwalk, C. CMV, D. Mumps', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e.,CMV"Viral culture of the urine and saliva obtained within first two weeks of life continue to be the gold standard for diagnosis of Congenital CMV infection"', 'role': 'assistant'}]