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: Pathology
[{'content': 'Least common mode of transmission of HIV- \nSelect and explain. \nA. Homosexual contact, B. Heterosexual, C. IV drug abuse, D. Transfusion of blood products', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Homosexual or Heterosexual contact\xa0\xa0→\xa050-70%\nIV drug abuse\xa0\xa0→\xa025%\nRecipient of blood and blood components\xa0→\xa01%\nHaemophiliacs receiving factor VIII or IX\xa0\xa0→\xa00.5%', 'role': 'assistant'}]