Which type of antibody is transferred from the mother to the fetus through the placenta?

Which of the following statements is incorrect regarding passive immunity?

Where are memory cells produced?

Which of the following are included in primary lymphoid organs?

Which of the following is $NOT$ included in primary lymphoid organs?

Read the following statements and choose the correct set of statements $:$
$(a)$ Cell-mediated immune response is responsible for the graft rejection.
$(b)$ Grafts from just any source $-$ an animal,another primate,or any human beings can be made since the grafts would be accepted sooner or later.
$(c)$ The organs cannot be taken from just anybody for transplant.
$(d)$ Tissue matching,blood group matching are essential before undertaking any graft/transplant.
Choose the correct answer from the options given below $:$