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
Treatment of chlamydia pneumonia is- 
Select and explain. 
A. Erythromycin, B. Ceftriaxone, C. Penicillin, D. Sulphonamide
A: Erythromycin
Answer: A: Erythromycin 
Explanation: None