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
Mycobacterial species differentiated by all except 
Select and explain. 
A. Catalase test, B. Amidase, C. Niacin, D. Oxidase
D: Oxidase
Answer: D: Oxidase 
Explanation: Ans. is 'd' i.e., Oxidase