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
Least common mode of transmission of HIV? 
Select and explain. 
A. Homosexual contact, B. Heterosexual, C. IV drug abuse, D. Transfusion of blood products
D: Transfusion of blood products
Answer: D: Transfusion of blood products 
Explanation: Ans. is 'd' i.e., Transfusion of blood product o Homosexual or Heterosexual contact -4 50-70% o IV drug abuse --> 25% o Recipient of blood and blood components --> 1% o Hemophiliaes receiving factor VIII or IX 0.5%