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
Actinomyces differs from bacteria in that: 
Select and explain. 
A. Gram positive, B. Filamentous organism, C. Non-motile, D. Non-acid fast
B: Filamentous organism
Answer: B: Filamentous organism 
Explanation: Ans. is. 'b' i. e. Filamentous organism