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
Complements produced by spleen 
Select and explain. 
A. C1, B. C2, C4, C. C5, C8, D. C3, C6
C: C5, C8
Answer: C: C5, C8 
Explanation: C1 -Intestinal epithelium
C2, C4 - Macrophages
C5, C8 - Spleen
C3, C6, C9 - Liver.