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 occur in following drug with high doses : 
Select and explain. 
A. Phenytoin and Propranolol, B. Digoxin and Propranolol, C. Amiloride and Probenecid, D. Lithium and Theophylline
A: Phenytoin and Propranolol
Answer: A: Phenytoin and Propranolol 
Explanation: Ans. is 'a' i.e., Phenytoin and Propranolol