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
Single dose treatment for chlamydia is? 
Select and explain. 
A. Doxycycline, B. Tetracycline, C. Azithromycin, D. Erythromycin
C: Azithromycin
Answer: C: Azithromycin 
Explanation: None