What would be the phenotype of a person that was deficient i

What would be the phenotype of a person that was deficient in the complement protein C7?
Please explain the answer

1 They would be unable to opsonize bacteria
2 They would be unable to clear immune complexes
3 They would never have any inflammation
4 They would be unable to form MACs

Solution

Answer:

4 They would be unable to form MACs

Together with the other proteins of the terminal pathway, C7 forms the membrane attack complex or MAC.