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
[{'content': '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 ? \nSelect and explain. \nA. Leukotrienes, B. Prostaglandin E, C. Thromboxane A2, D. Prostacyclin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]