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
All of the following are therapeutic uses of Penicillin G, except: 
Select and explain. 
A. Bacterial meningitis, B. Rickettsial infection, C. Syphilis, D. Anthrax
B: Rickettsial infection
Answer: B: Rickettsial infection 
Explanation: None