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 the most important mediator implicated in development of fever: \nSelect and explain. \nA. PGF2, B. PGE2, C. PGD2, D. FGA2', 'role': 'user'}, {'content': 'Answer: B \nExplanation: PGF2α is a vasoconstrictor whereas PGD2 and PGE2 are vasodilators.\xa0\nPGE2 is the most important chemical for development of fever.', 'role': 'assistant'}]