Which of the following is $NOT$ included in passive acquired immunity?

Regarding kidney transplantation,four statements are given below. Select the correct statements.
$i.$ During kidney transplantation,the recipient's immune system is suppressed for a long time.
$ii.$ Cell-mediated immunity is responsible for the rejection of the transplant.
$iii.$ $B$-lymphocytes are responsible for the rejection of the transplant.
$iv.$ Specific interferons are responsible for the acceptance or rejection of the kidney transplant.
Select the correct option:

Which of the following provides passive immunity?

After birth,an infant receives antibodies $IgA$ through colostrum from the mother. This is an example of . . . . . . immunity.

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

$A$ mammal born without a thymus gland is unable to produce which of the following?