Drug of choice for prophyllaxis of rheum fever in a pt with

Drug of choice for prophyllaxis of rheum fever in a pt with penicillin allergy
A. Erythromycin
B. Clindamycin
C. Vancomycin
D. Cefaclor

A. Erythromycin

Well! For primary prevention of rheumatic fever (treatment of streptococcal pharyngitis), the treatment of choice is first generation cephalosporin in patients with penicillin allergy. Only in a patient with penicillin anaphylaxis, erythromycin is used.
For secondary prevention of rheumatic fever, sulfonamides are used in a patient with penicillin allergy and erythromycin if anaphylactic o penicillin.

probable answer for our question i think is cefaclor