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': 'Most common mode of transmission of HIV world wide is - \nSelect and explain. \nA. Heterosexual, B. Homosexual, C. IV-drug abuse, D. Contaminated blood products', 'role': 'user'}, {'content': 'Answer: A \nExplanation: most common mode of transmission of HIV virus is through hetrosexual REF:ANANTHANARAYANAN TEXT BOOK OF MICROBIOLOGY 9EDITION PGNO.570', 'role': 'assistant'}]