system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which compliment blinds with Fc poion of IgM in Classic pathway ?
assistant
The correct answer is  Ans. is 'a' i.e., C1 C1q poion of C1 binds to the Fc poion of IgM (CH2 region) and IgG (CH4 region).