This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Which of the following Corynebacterium toxin is similar to that of diphtheria toxin? 
Select and explain. 
A. C. auris, B. C. jivelai, C. C. ulcerans, D. C.mimicum
C: C. ulcerans
Answer: C: C. ulcerans 
Explanation: Corynebacterium ulcerans:*Primarily an animal pathogen (bovine mastitis)*Can harbor diphtheria toxin gene but differences in the receptor binding and translocation domains*Exudative pharyngitis in humans indistinguishable from diphtheria*Several outbreaks of diphtheria have been found to be caused by C.ulcerans than C.diphtheriae and made it impoant epidemiologically*Spectrum of illness was similar to C.diphtheriaeToxin-producing Corynebacterium:1.C.diphtheriae2.C.ulcerans3.C.pseudotuberculosisRef: Ananthanarayan 9th edition, p242