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': 'The following chemical mediator is a product of arachidonic add metabolite by cyclo oxygenase pathway \nSelect and explain. \nA. LxA4, B. LxB4, C. 5-HETE, D. PGH2', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]