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: Medicine
Drug of choice for Leptospirosis- 
Select and explain. 
A. Penicillin, B. Tetracycline, C. Suplhonamide, D. Erythromycin
A: Penicillin
Answer: A: Penicillin 
Explanation: None