Which antibody is present in abundant amounts in colostrum?

Humoral antibodies are produced by

Match the following columns:

Column-$I$	Column-$II$
$1.$ Saliva and tears	$a.$ Cytokine barrier
$2.$ Mucus coating	$b.$ Cellular barrier
$3.$ $PMNL$	$c.$ Physiological barrier
$4.$ Interferons	$d.$ Physical barrier

Given below are two statements.
Statement $I$: Passive immunity is acquired when readymade antibodies are received by body cells.
Statement $II$: Resistance induced by $BCG$ vaccine is an example of passive immunity.
In the light of the above two statements,choose the correct answer from the options given below.

Which of the following is $NOT$ associated with lymphoid organs?

The 'second line of defence' is known as