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
Acid fast structure is: 
Select and explain. 
A. Vibrio, B. Nocardia, C. E. coli, D. Bacillus anthracis
B: Nocardia
Answer: B: Nocardia 
Explanation: Ans. b. Nocardia