The number of pairs of false ribs is

Options

A. 2
B. 3
C. 4
D. 7 .

Answer

To determine the number of pairs of false ribs in humans, we can follow these steps:

1. **Understand the Structure of Ribs**: Humans typically have 12 pairs of ribs. These ribs can be categorized into three types based on their attachment to the sternum.

2. **Identify True Ribs**: The first 7 pairs of ribs (1st to 7th) are known as true ribs. They are directly attached to the sternum.

3. **Identify False Ribs**: The next 3 pairs of ribs (8th, 9th, and 10th) are classified as false ribs. These ribs do not attach directly to the sternum; instead, they are connected to the 7th rib through cartilage.

4. **Identify Floating Ribs**: The last 2 pairs of ribs (11th and 12th) are termed floating ribs because they are not attached to the sternum at all.

5. **Count the False Ribs**: Since the false ribs are specifically the 8th, 9th, and 10th pairs, we can conclude that there are 3 pairs of false ribs.

Thus, the answer to the question is that the number of pairs of false ribs is **3**.