Wish bone is a bone found in birds

Options

A. Elongated pelvic girdle
B. Keeled pectoral girdle
C. Product of fused clavicles
D. Knee bone

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking which bone is specifically found in birds, and it refers to the "wishbone."

2. **Identifying the Options**: The options provided are:
- A) Elongated pelvic girdle
- B) Keeled pectoral girdle
- C) Product of fused clavicles
- D) Knee bones

3. **Analyzing the Characteristics of Birds**:
- Birds are warm-blooded vertebrates belonging to the class Aves.
- They possess feathers and toothless beaks.
- Their wings are evolved from forelimbs, aiding in flight.

4. **Focusing on the Wishbone**:
- The wishbone is scientifically known as the "furcula."
- The furcula is formed by the fusion of two clavicles into a single V-shaped structure.
- It is located at the base of the neck in birds.

5. **Functions of the Furcula (Wishbone)**:
- It strengthens the thoracic skeleton.
- It acts as a spring in the pectoral girdle during flight.
- It helps store energy generated by muscle contractions and releases it during the upstroke of flight.
- It also plays a role in respiration.

6. **Evaluating the Options**:
- **Option A**: Elongated pelvic girdle - This is not the wishbone.
- **Option B**: Keeled pectoral girdle - This is a different structure related to flight but not the wishbone.
- **Option C**: Product of fused clavicles - This correctly describes the wishbone (furcula).
- **Option D**: Knee bones - This is unrelated to the wishbone.

7. **Conclusion**: The correct answer is **Option C**, which states that the wishbone is the product of fused clavicles.