Question

152. The most appreciable attribute of acquired immunity
is that
(1) It ensures instant killing of foreign antigen cells
(2) It makes antibodies against foreign antigens to
destroy them
(3) It exhibits immunological memory that ensures
heightened state of immune reactivity on second
encounter with antigen
(4) It never allows foreign grafts to fluorish in the
system of host
​

Answer 1

4 no is most appropriate