The yellowish fluid "colostrum" secreted by mammary glands of mother during the initial days of lactation has abundant antibodies ($lgA$) to protect the infant. This type of immunity is called as 

Assertion : Interferons are a type of'antibodies produced by body cells infected by bacteria.

Reason : Interferons stimulate inflammation at the site of injury.

The principle function of the lymph node in the man is

Assertion : Organ transplantation patients are given immunosuppressive drugs.

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

Assertion : Interferons are effective against viruses.

Reason : Proteins which can be synthesized only by genetic engineering are effective against viruses.

An autoimmune disease is