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: Social & Preventive Medicine
What is the recommended drug for treatment of leptospirosis? 
Select and explain. 
A. Penicillin, B. Tetracycline, C. Azithromycin, D. Erythromycin
A: Penicillin
Answer: A: Penicillin 
Explanation: Penicillin is the drug of choice for treatment of leptospirosis. Tetracycline or doxycycline may also be used. Ref: Park 21st edition, page 267.