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': 'The gene coding for core of HIV is - \nSelect and explain. \nA. GAG, B. ENV, C. POL, D. TAT', 'role': 'user'}, {'content': "Answer: A \nExplanation: The Gag gene determines the core and shell of the virus. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-571", 'role': 'assistant'}]