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
Virulence factors for meningococci -a) Capsuleb) Pili c) Endotoxind) Coagulasee) M. Protein 
Select and explain. 
A. ac, B. abc, C. ade, D. bc
B: abc
Answer: B: abc 
Explanation: Virulence factor of Meningococcus:

Refer text (chapter review) for explanation:
Option d: Coagulase is a Virulence factor for Staphylococcus
Option e: M protein is a Virulence factor for Streptococcus.

Ref: Apurba Sastry’s Essentials of Medical Microbiology 1/e p236