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
Drug of choice for carriers of typhoid is 
Select and explain. 
A. Ampicillin, B. Chloramphenicol, C. Co-trimoxazole, D. Clindamycin
A: Ampicillin
Answer: A: Ampicillin 
Explanation: None