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': 'Which of the following is not a structural gene of HIV \nSelect and explain. \nA. Gag, B. Pol, C. ENV, D. Tat', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Tat", 'role': 'assistant'}]