Discussion
The major role of the complement system is to work in conjunction with
Answer: A
Correct answer: antibodies to lyse cells via the C8 and C9 components
C8 and C9 are the terminal components: C9 polymerises to form the pore of the membrane attack complex, and the cell lyses osmotically. Complement does also opsonise, through C3b, but the option naming C8 and C9 identifies the lytic function that these particular components perform, which is the one being asked about.
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