This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: viral infection, Subject name: Medicine
[{'content': 'Approximate time interval between HIV infection and development of AIDS is \nSelect and explain. \nA. 7.5 years, B. 10 years, C. 12 years, D. 15 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: HIV 1 (India)- 10 years HIV 2 (Africa)- 15 years', 'role': 'assistant'}]