This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
[{'content': 'Ibuprofen acts on: \nSelect and explain. \nA. Lipoxygenase pathway, B. Cyclooxygenase pathway, C. Kinin system, D. Serotonin system', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ibuprofen is an NSAID - So acts on COX pathway ESSENTIALS OF MEDICAL PHARMACOLOGY;7TH EDITION;KD TRIPATHI;PAGE NO 193', 'role': 'assistant'}]