In which bone is the bony cavity known as $Sella$ $Turcica$ formed?

Pick out the correct match.

Fused vertebrae in human are
$I.$ Sacral
$II.$ Coccygeal
$III.$ Thoracic
$IV.$ Cervical
$V.$ Lumbar

$A$ vertebra has a convexity both in front and behind it. It is called

Find out the correct order of the number of bones in the parts of the skull,such as cranial bones,facial bones,hyoid bone,and middle ear bones,respectively.

In mammals,the largest vertebra is