Arrange the following structures in the ascending order of number of bones they are made of A=Vertebral column, B=Skull, C=Ribs, D=Limb

Options

A. A - B - C - D
B. D - C - A - B
C. B - C - A - D
D. C - A - D - B

Answer

To arrange the structures in ascending order based on the number of bones they contain, we will analyze each structure one by one.

### Step-by-Step Solution:

1. **Identify the Number of Bones in Each Structure:**
- **A: Vertebral Column** - The vertebral column consists of **33 bones**.
- **B: Skull** - The skull is made up of **22 bones** (8 cranial bones and 14 facial bones).
- **C: Ribs** - The ribs consist of **24 bones** (12 pairs).
- **D: Limb** - The limbs contain a total of **126 bones** (64 in the arms, wrists, and hands; 62 in the legs, ankles, and feet).

2. **List the Structures with Their Bone Counts:**
- A: Vertebral Column - 33 bones
- B: Skull - 22 bones
- C: Ribs - 24 bones
- D: Limb - 126 bones

3. **Arrange the Structures in Ascending Order:**
- Start with the structure that has the least number of bones:
- **B: Skull (22 bones)**
- **C: Ribs (24 bones)**
- **A: Vertebral Column (33 bones)**
- **D: Limb (126 bones)**

4. **Final Arrangement:**
- The ascending order of the structures based on the number of bones is:
- **B (Skull) < C (Ribs) < A (Vertebral Column) < D (Limb)**

### Conclusion:
The correct order is **B, C, A, D**.