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
Only mycobacteria which produces exotoxin - 
Select and explain. 
A. M. tuberculosis, B. M. Ajarinum, C. M. Ulcerans, D. M.Bavis
C: M. Ulcerans
Answer: C: M. Ulcerans 
Explanation: Ans. is 'c' i.e., M. Ulcerans * Buruli ulcer is caused by M. ulcerans.* It is the only mycobacteria producing a toxin.