Lacking of $B$-cells and $T$-cells is known as

$T$- Lymphocytes originate from

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

Reason : Interferons stimulate inflammation at the site of injury.

For an organ transplant, it is an advantage to have an identical twin. Why ?

Many microbial pathogens enter the gut of humans along with food. What are the preventive barriers to protect the body from such pathogens ? What type of  immunity do you observe in this case ?

Select the incorrect statement with respect to acquired immunity.