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: Ophthalmology
Drug of choice of trachoma is 
Select and explain. 
A. Penicillin, B. Sulfonamide, C. Tetracycline, D. Chloramphenicol
C: Tetracycline
Answer: C: Tetracycline 
Explanation: C i.e. Tetracycline Treatment of Trachoma Oral tetracycline, doxycycline, azithromycin, clarithromycin, erythromycin, rifampicin & sulfonamides Oral tetracycline cannot be given to children < 8 years, pregnant women or nursing mothers. Sulfonamides have high risk of stevens Johnson syndrome and erythema multiforme. Topical treatment with tetracycline or erythromycin or sulfacetamide (less preffered) is cheaper more effective and has no risk of systemic side effects.