Question

The number of pairs of true ribs is

• A. 6
• B. 7
• C. 9
• D. 10

Answer 1

Answer: (B)

7

In humans, there are normally 12 pairs of ribs. The first seven pairs are attached directly to the sternum by costal cartilages and are called true ribs. The 8${}^{th}$, 9${}^{th}$ and 10${}^{th}$pairs are called as false ribs which do not join the sternum directly but are connected to the 7${}^{th}$ rib by cartilage. The 11${}^{th}$ and 12${}^{th}$ pairs are called floating ribs. So, the correct answer is '7'.