This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemical Mediators and Regulators of Inflammation, Subject name: Pathology
[{'content': 'C3 convertase acts on - \nSelect and explain. \nA. C4b2b, B. C4b2B3b, C. C4b, D. C3', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans- (D) C3 Reference- Jawetz Melnick & Adelbergs Medical Microbiology - 27E (2016) Page 142. The latter protein (C4b2b) is an active C3 convertase, whichsplits C3 molecules into two fragments: C3a and C3b. C14b2a is known as C3 convertase which activates C3 to C3a (chemotactic and anaphylotoxin) and C3b', 'role': 'assistant'}]