The smallest bone in the skeleton of a rabbit or a human is:

Read the following Assertion $(A)$ and Reason $(R)$ and choose the correct option.
Assertion $(A):$ All $12$ pairs of ribs are called bicephalic.
Reason $(R):$ Each rib is connected dorsally to the vertebral column by $2$ heads of articulation.

Which one is an odd pair?

Coccygeal bone is formed by the fusion of ......... bones in man.

Which elements are most abundant in the formation of bones?

Match the following columns:

Column-$I$ (Vertebrae)	Column-$II$ (Number of bones)
$P$. Cervical	$I$. $1$
$Q$. Thoracic	$II$. $12$
$R$. Lumbar	$III$. $5$
$S$. Sacral	$IV$. $7$
$T$. Coccygeal	$V$. $(1)$ fused