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': 'All of the following methods are used for the diagnosis of HIV infection in a 2 month old child, except - \nSelect and explain. \nA. DNA_PCR, B. Viral culture, C. HIV ELISA, D. p24 antigen assay', 'role': 'user'}, {'content': 'Answer: C \nExplanation: diagnosis of HIV in 2 month old child is by p24 Sg asday ,PCR&viral culture.ELISA id not used REF:<\\p> MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.575', 'role': 'assistant'}]