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
$A-heart; B-breast bone$
$A-liver; B-ribs$
$A-heart; B-ribs$
$A-intestine; B-ribs$
Given below are two statements :
Statement $I:$Autoimmune disorder is a condition where body defense mechanism recognizes its own cells as foreign bodies.
Statement $II:$Rheumatoid arthritis is a condition where body does not attack self cells.
In the light of the above statements, choose the most appropriate answer from the options given below:
Active immunity may be acquired by
The function of vaccine is the production and storage of
Which of the following is not an autoimmune disease?
Spleen is