Floating ribs of the thoracic cage are

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(D) In humans,there are $12$ pairs of ribs. The first $7$ pairs are called true ribs because they are directly attached to the sternum. The $8^{	ext{

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$11^{	ext{th}}$ to $12^{	ext{th}}$ pair

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(D) In humans,there are $12$ pairs of ribs. The first $7$ pairs are called true ribs because they are directly attached to the sternum. The $8^{	ext{th}}$,$9^{	ext{th}}$,and $10^{	ext{th}}$ pairs are called false ribs (vertebrochondral ribs) as they do not attach directly to the sternum but join the $7^{	ext{th}}$ rib. The last two pairs,i.e.,the $11^{	ext{th}}$ and $12^{	ext{th}}$ pairs,are not connected to the sternum at all and are therefore known as floating ribs.

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