Question

which antibody is able to cross the placenta?
a ige
b igd
c igm
d igg

Explanation:

IgG is the only antibody class that can cross the placenta. It provides passive immunity to the fetus and newborn, protecting them from various infections. IgE is mainly involved in allergic reactions, IgD has a less - defined function in B - cell activation, and IgM is the first antibody produced in an immune response but is too large to cross the placenta easily.

Answer:

D. IgG