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
'Spider' colonies is produced by: September 2004 
Select and explain. 
A. Bordetella peusis, B. Vibrio cholerae, C. Actinomyces israelii, D. M. leprae
C: Actinomyces israelii
Answer: C: Actinomyces israelii 
Explanation: Ans. C i.e. Actinomycese israelii