The number of bones present in the 1st, 2nd, and 3rd rows of trasals is

Options

A. 2,2,1
B. 2,3,1
C. 2,1,3
D. 1,2,3

Answer

To solve the question regarding the number of bones present in the 1st, 2nd, and 3rd rows of tarsals, we will break it down step by step.

### Step-by-Step Solution:

1. **Understand the Structure of Tarsal Bones**:
- The tarsal bones are located in the foot and are divided into three rows: proximal, intermediate, and distal.

2. **Identify the Bones in Each Row**:
- **Proximal Row**: This row consists of 2 bones:
- Talus
- Calcaneum
- **Intermediate Row**: This row consists of 1 bone:
- Navicular
- **Distal Row**: This row consists of 3 bones:
- Medial cuneiform
- Intermediate cuneiform
- Lateral cuneiform
- Cuboid

3. **Count the Bones in Each Row**:
- Proximal Row: 2 bones
- Intermediate Row: 1 bone
- Distal Row: 3 bones

4. **Combine the Counts**:
- Now, we can summarize the counts:
- Proximal Row: 2
- Intermediate Row: 1
- Distal Row: 3
- Therefore, the total number of bones in the three rows is 2 (proximal) + 1 (intermediate) + 3 (distal) = 6 bones.

5. **Express the Counts in Order**:
- The number of bones in the 1st (distal), 2nd (intermediate), and 3rd (proximal) rows can be expressed as:
- Distal: 3
- Intermediate: 1
- Proximal: 2
- Thus, the answer can be represented as 213.

6. **Select the Correct Option**:
- Among the given options (221, 231, 213, 123), the correct answer is **213**.

### Final Answer:
The number of bones present in the 1st, 2nd, and 3rd rows of tarsals is **213**.