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
Oral infection by penicillinase producing organisms should be treated with: 
Select and explain. 
A. Ampicillin, B. Dicloxacillin, C. Erythromycin, D. Any of the above
B: Dicloxacillin
Answer: B: Dicloxacillin 
Explanation: None