provides passive immunity

Why is mother's milk considered the most appropriate food for a new born infant ?

The immune system which works against self is

The thymus is a lobed organ located near the $…A…$ and beneath the $…B… $ The most appropriate combination for $\mathrm{A}$ and $\mathrm{B}$ is

Assertion : Organ transplantation patients are given immunosuppressive drugs.

Reason : Transplanted tissue has antigens which stimulate the specific immune response of the recipient.