Assertion $A$: Cell-mediated immunity is responsible for the rejection of organ transplants. Reason $R$: The body's immune system has the ability to differentiate between self and non-self. Which option is correct for Assertion $A$ and Reason $R$?

In which type of acquired immunity are ready-made antibodies introduced into the host body?

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

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 $:$

Statement $A$: Innate immunity provides a primary response.
Reason $R$: Acquired immunity provides a secondary response.
Which option is correct for Statement $A$ and Reason $R$?

Which of the following types of immunity is present at the time of birth and is a non-specific type of defense in the human body?