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: Pharmacology
Aspirin in very low doses inhibits the formation of: September 2006 
Select and explain. 
A. Cyclooxygenase, B. Thromboxane A2, C. Prostaglandin 12, D. None of the above
B: Thromboxane A2
Answer: B: Thromboxane A2 
Explanation: Ans. B: Thromboxane A2