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: Pathology
Factor present in the final common terminal complement pathway is: 
Select and explain. 
A. C4, B. C3, C. C5, D. Protein B
C: C5
Answer: C: C5 
Explanation: The terminal pathway that is common to all pathways of the complement system leads to the membrane attack complex and consists of factors C5, C6, C7, C8 and C9 (C5b6789)