This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
C3 convease acts on - 
Select and explain. 
A. C4b2b, B. C4b2B3a, C. C4b, D. C3
D: C3
Answer: D: C3 
Explanation: C3 convease splits split C3 into two fragments : C3a which is an anaphylatoxin and C3b which remains cell bound along with C4b2a to form a trimolecular complex C4b2a3b which has enzymatic activity and is called C5 convease. Reference : Anathanarayan & paniker's 9th edition, pg no: 122 <\p>