This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Toxin is produced by all except: 
Select and explain. 
A. C. diphtheriae, B. C. ulcerans, C. C. hofmanni, D. C. pseudotuberculosis
C: C. hofmanni
Answer: C: C. hofmanni 
Explanation: Ans. is 'c' i.e., Corynebacterium hofmannii(Ref: Ananthanarayan, 9th/e, p. 242 and 8th/e, p. 239; Harrison, 17th/e, p. 893-941; Greenwood)Among the Corynebacterium species, three Corynebacterium produce diphtheria toxin: C. diphtheriae, C. pseudotuberculosis and C. ulcerans. "Like C. diphtheriae, C. pseudotuberculosis and C. ulcerans can produce toxin and cause clinically resembling Diphtheria."