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 control of peussis, the drug of choice for cases? 
Select and explain. 
A. Erythromycin, B. Ciprofloxacin, C. Tetracycline, D. Penicillin
A: Erythromycin
Answer: A: Erythromycin 
Explanation: Ans. is 'a' i.e., Erythromycin Control of whooping cough o Control of whooping cough requires :? 1) Management of cases and contacts 2) Prevention by active immunization Cases: Erythromycin is the DOC. Alternatives are ampicillin, tetracyclin & septran. Contacts : Those who are exposed ---> 10 days erythromycin