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
Treatment of choice for chancroid is : 
Select and explain. 
A. Penicillin, B. Chloramphenicol, C. Tetracyclines, D. Erythromycin
D: Erythromycin
Answer: D: Erythromycin 
Explanation: None