Q: Fact 1: Passive immunity lasts only as long as the antibodies survive in body fluids. Fact 2: An antibody is a protein that attaches to an antigen. Given the two facts above, what lasts only as long as the proteins that attach to an antigen survive in body fluids?

Pick from:
a). hospitalization.
b). recovery.
c). parasites.
d). solid, liquid, gas.
e). Leptospirosis.
f). Allergies.
g). resistance.
h). passive immunity.
A:
h).