Number of phalanges in the thumb is

Options

A. Three
B. One
C. Four
D. Two

Answer

To determine the number of phalanges in the thumb, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Phalanges**:
- Phalanges are the bones in the fingers and toes. Each finger typically has three phalanges: proximal, middle, and distal.

2. **Identify the Phalanges in the Thumb**:
- In the thumb, there are two phalanges: the proximal phalanx and the distal phalanx.

3. **Recognize the Absence of the Middle Phalanx**:
- Unlike the other fingers, the thumb does not have a middle phalanx. This is a key distinction that sets the thumb apart from the other fingers.

4. **Count the Phalanges in the Thumb**:
- Since the thumb consists of only the proximal and distal phalanges, we can conclude that there are a total of 2 phalanges in the thumb.

5. **Final Answer**:
- Therefore, the number of phalanges in the thumb is **2**.