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
Zero order kinetics is followed by all of the following drugs EXCEPT: 
Select and explain. 
A. Phenytoin, B. Barbiturates, C. Alcohol, D. Theophylline
B: Barbiturates
Answer: B: Barbiturates 
Explanation: None