Presence of a foramen for an artery is a characteristic of which bone?

Select the correct option regarding the human rib cage.

In man,the axial skeleton is made up of: (in $bones$)

The total number of vertebrae in man is

An elderly woman slipped in the bathroom and had severe pain in her lower back. After $X-ray$ examination,doctors told her it is due to a slipped disc. What does that mean? How does it affect our health?

Number of floating ribs are (in $pairs$)