This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Drug of choice for Diphtheria carriers is \nSelect and explain. \nA. Erythromycin, B. Tetracycline, C. Amoxycillin, D. Penicillin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Diphtheria:- Clinical features :- * Present as pharyngo tonsillar form (most common), laryngo tracheal form (most severe) and nasal diphtheria (mild form) Control of diphtheria * Cases to be isolated for 14 days * Treatment- cases- Antitoxin * Treatment Carriers - Ehromycin-10 day course Ref:- K Park, 24th ed; pg num:- 171', 'role': 'assistant'}]