Microbiology General c9442713 Which compliment blinds with Fc poion of IgM in Classic pathway ? A CI B C2 C C3 D C4 High-Yield Explanation Ans. is 'a' i.e., C1 C1q poion of C1 binds to the Fc poion of IgM (CH2 region) and IgG (CH4 region).