This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Regarding phenytoin, false is: \nSelect and explain. \nA. Induces microsomal enzymes, B. At very low doses, zero order kinetics occur, C. Higher the dose, higher is the half life, D. Highly protein bound', 'role': 'user'}, {'content': 'Answer: B \nExplanation: *Phenytoin follows saturation kinetics (kinetics changes from first order to zero within therapeutic concentration), Zero order kinetics are seen at high doses. *It is also a potent enzyme inducer and can increase the metabolism of various drugs. *It is 80-90% plasma protein bound. REF: KATZUNG 14TH ED.', 'role': 'assistant'}]