This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemical Mediators and Regulators of Inflammation, Subject name: Pathology
[{'content': 'Which of the following is a chemotactic factor? \nSelect and explain. \nA. Prostaglandins, B. Prostacyclins, C. Thromboxane, D. Leukotrienes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: ANSWER: (D) LeukotrienesREF: Robbins 7th ed page 56"Endogenous chemo attractants are C5a, leukotriene B4, IL-8"See APPENDIX-19 for "CYTOKINES', 'role': 'assistant'}]