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
Which one of the following is penicillinase resistant penicillin: 
Select and explain. 
A. Amoxycillin, B. Cloxacillin, C. Ampicillin, D. Penicillin G
B: Cloxacillin
Answer: B: Cloxacillin 
Explanation: None