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
Drug of choice for sore throat caused by Group A beta hemolytic streptococcus is : 
Select and explain. 
A. Erythromycin, B. Penicillin, C. Ceftriaxone, D. Sulfonamides
B: Penicillin
Answer: B: Penicillin 
Explanation: None