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: Pharmacology
[{'content': 'Zero order kinetics is followed by all of the following drugs EXCEPT: \nSelect and explain. \nA. Phenytoin, B. Barbiturates, C. Alcohol, D. Theophylline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]