Which of the following is associated with passive immunity? a) exposure to an antigenb) infusion of weakened virusesc) passage of igg antibodies from a pregnant mother to her fetus d) booster shot of vaccine

Hey there!:

Passive immunity can occur naturally, when maternal antibodies are transferred to the fetus through the placenta, and it can also be induced artificially.

The option D passage of IgG antibodies from a pregnant mother to her fetus is the correct answer

all the above is what i would say