Choose the incorrect statement from the following :
a . 12 pairs of ribs are present .
b. Ribs dorsally articulate with sternum and ventrally with the vertebral column .
c . Ribs are not bicephalic
d. Ribs are attached with sternum with the help of hyaline cartilage.

Options

A. a and b
B. b and c
C. a and c
D. c and d

Answer

To solve the question, we need to analyze each statement regarding ribs and identify which one is incorrect.

1. **Statement A**: "12 pairs of ribs are present."
- This statement is **correct**. Humans typically have 12 pairs of ribs.

2. **Statement B**: "Ribs dorsally articulate with sternum and ventrally with the vertebral column."
- This statement is **incorrect**. Ribs articulate **ventrally** with the sternum and **dorsally** with the vertebral column.

3. **Statement C**: "Ribs are not bicephalic."
- This statement is **incorrect**. Ribs are indeed bicephalic, meaning they have two articulation points on their dorsal end.

4. **Statement D**: "Ribs are attached with sternum with the help of hyaline cartilage."
- This statement is **correct**. Ribs are connected to the sternum via hyaline cartilage.

Based on the analysis:
- The incorrect statements are B and C.

Therefore, the answer to the question is **Option B and C**.