Which type of immunity is slow and takes time to provide an effective response?

Innate immunity is characterized by:

$T$-Lymphocytes originate from

Consider the following four statements $(i-iv)$ regarding kidney transplantation and select the two correct ones.
$(i)$ Even if a kidney transplant is successful,the recipient needs to take immunosuppressants for a long time.
$(ii)$ Cell-mediated immune response is responsible for the rejection of the graft.
$(iii)$ $B$-lymphocytes are responsible for the rejection of the graft.
$(iv)$ The acceptance or rejection of a transplanted kidney depends on specific interferons.

Who is known as the father of immunology?

How many types of memory cells are there in the immune system?