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: Homosexual or Heterosexual contact  → 50-70%
IV drug abuse  → 25%
Recipient of blood and blood components → 1%
Haemophiliacs receiving factor VIII or IX  → 0.5%