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
A patient comes to you complaining that whenever he takes aspirin for headache, he develops severe shortness of breath. Which of the following may be partly responsible for this effect ? 
Select and explain. 
A. Leukotrienes, B. Prostaglandin E, C. Thromboxane A2, D. Prostacyclin
A: Leukotrienes
Answer: A: Leukotrienes 
Explanation: None