This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Prostaglandins, Subject name: Pharmacology
[{'content': 'Mechanism of action of zileuton: \nSelect and explain. \nA. Inhibit prostaglandin synthesis, B. Inhibit COX, C. Inhibit LOX, D. Inhibit mast cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Inhibit LOXArachidonic acid is acted upon by two enzyme-COX and LOX. Lox converts it into leukotrienes and Cox into prostaglandin. Zileuton is the inhibitor of LOX enzyme and it is used in treatment of asthma.', 'role': 'assistant'}]