<prompt> Drug of choice for carriers of diphtheria isPenicillin GSeptranTetracyclineErythromycin  <response>: Corynebacterium diphtheriae is sensitive to Penicillin and can be cleared from the throat within a few days by Penicillin treatment. Erythromycin is more active than Penicillin in the treatment of carriers. Reference: Textbook of Microbiology; Anathanarayan and panickers; 10th edition; Page no: 245 