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
In CSSM programme drug of choice for Pneumonia: 
Select and explain. 
A. Chloramphenicol, B. Doxycycline, C. Erythromycin, D. Co-trimoxazole
D: Co-trimoxazole
Answer: D: Co-trimoxazole 
Explanation: None