This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2017, Subject name: Microbiology
Which of the following is anaerobic non - acid fast bacilli: 
Select and explain. 
A. Tuberculosis, B. Listeria, C. Nocardia, D. Actinomyces
D: Actinomyces
Answer: D: Actinomyces 
Explanation: Actinomyces is an obligate anaerobe & Non acid fast Tuberculosis- it is Gram positive acid fast 20% (depends on mycolic acid content) Listeria-it is Gram positive coccobacilli Nocardia -it is Obligate aerobe , acid fast (1%)