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
[{'content': 'Which of the following is a chemotactic factor: \nSelect and explain. \nA. Prostaglandins, B. Prostacyclins, C. Thromboxanes, D. Leukotrienes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Leukotrienes', 'role': 'assistant'}]