This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Anatomy
The drug of choice for chemoprophylaxis for H.influenzae is 
Select and explain. 
A. Rifampin, B. Ceftriaxone, C. Penicillin, D. Erythromycin
A: Rifampin
Answer: A: Rifampin 
Explanation: Oral rifampin is the drug of choice