Resistance against pathogens is due to

Identify the correct statement regarding diseases and immunity.

The cells which suppress the entire immune system from its attack in the same body are known as

In higher vertebrates,the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells,then it leads to

In the list given below,how many are secondary lymphoid organs?
Thymus,Spleen,Bone marrow,Tonsil,Appendix

$A$ - Colostrum contains several antibodies.
$R$ - Due to colostrum,immunity is decreased in the child.