The sound producing organ in singing bird is

Options

A. Vocal sacs
B. Syrinx
C. Larynx
D. Synsacrum

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the sound-producing organ in singing birds. This requires knowledge of avian anatomy, particularly the organs involved in sound production.

2. **Identifying the Options**: The first step is to consider the options provided. The options include:
- Vocal sacs
- Siring (syrinx)
- Syn-sacrum
- Larynx

3. **Analyzing Each Option**:
- **Vocal Sacs**: These are sound-producing organs found in some animals but are absent in birds.
- **Syrinx**: This is a unique organ found in birds, located at the base of the trachea, which is responsible for sound production.
- **Syn-sacrum**: This is a structure made up of fused vertebrae that aids in flight and does not produce sound.
- **Larynx**: While the larynx is involved in sound production in mammals, birds primarily use the syrinx for this purpose.

4. **Conclusion**: Based on the analysis, the correct answer is the **syrinx**, as it is the specialized organ in birds that produces sound.

**Final Answer**: The sound-producing organ in singing birds is the **syrinx**.

---