Clinical diphtheria is caused by -: (A) Corynebacterium diphtheriae, (B) Corynebacterium parvum, (C) C. ulcerans, (D) Streptococcus pyogenes
Answer is A. Ans. is 'a' i.e., Corynebacterium diphtheriae Diphtheria is a nasophaiyngeal & skin infection caused by Corynebacterium diphtheriae