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
[{'content': 'Which compliment blinds with Fc poion of IgM in Classic pathway ? \nSelect and explain. \nA. CI, B. C2, C. C3, D. C4', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., C1 C1q poion of C1 binds to the Fc poion of IgM (CH2 region) and IgG (CH4 region).", 'role': 'assistant'}]