This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Corynebacterum other than diphtheriae carrying toxin: 
Select and explain. 
A. Corynebacterium ulcerans, B. Corynebacterium xerosis, C. Corynebacterium striatum, D. Corynebacterium urealyticum
A: Corynebacterium ulcerans
Answer: A: Corynebacterium ulcerans 
Explanation: Ans. is. 'a' i. e. Corynebacterium ulcerans