Phalangeal formula for human forelimbs is

Options

A. 33233
B. 33333
C. 33433
D. 23333

Answer

### Step-by-Step Solution:

1. **Understanding Phalanges**:
- Phalanges are the bones that make up the fingers and toes. In humans, the forelimb refers to the hand, while the hindlimb refers to the foot.

2. **Identifying the Structure of the Human Hand**:
- The human hand consists of a total of 5 digits: 1 thumb and 4 fingers.

3. **Counting the Phalanges**:
- Each digit has a specific number of phalanges:
- **Thumb**: 2 phalanges (proximal and distal)
- **Index Finger**: 3 phalanges (proximal, middle, and distal)
- **Middle Finger**: 3 phalanges (proximal, middle, and distal)
- **Ring Finger**: 3 phalanges (proximal, middle, and distal)
- **Little Finger**: 3 phalanges (proximal, middle, and distal)

4. **Writing the Phalangeal Formula**:
- The phalangeal formula for the human forelimb can be represented as:
- **Thumb**: 2
- **Index Finger**: 3
- **Middle Finger**: 3
- **Ring Finger**: 3
- **Little Finger**: 3
- Therefore, the complete phalangeal formula is written as: **2-3-3-3-3**.

5. **Final Answer**:
- The phalangeal formula for human forelimbs is **2-3-3-3-3**.