Common passage for food and air in humans is

Options

A. Oesophagus
B. Nasopharynx
C. Laryngopharynx
D. Larynx

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the common passage for food and air in humans. We need to identify which part of the human anatomy serves this function.

2. **Identifying the Options**: The options provided are:
- Esophagus
- Nasopharynx
- Laryngopharynx
- Larynx

3. **Analyzing Each Option**:
- **Esophagus**: This is part of the digestive system and is responsible for transporting food from the throat to the stomach. It does not serve as a passage for air. Therefore, this option is incorrect.
- **Nasopharynx**: This is the upper part of the pharynx located behind the nose. It primarily serves as a passage for air only, not for food. Thus, this option is also incorrect.
- **Larynx**: Known as the voice box, the larynx is involved in sound production and also plays a role in directing air into the trachea. It does not serve as a passage for food. Hence, this option is incorrect as well.
- **Laryngopharynx**: This is the most inferior part of the pharynx and extends from the hyoid bone down to the lower margin of the larynx. It serves as a common passage for both air (from the nasal cavity) and food (from the oral cavity) before they separate into the trachea and esophagus, respectively.

4. **Conclusion**: The correct answer is **Laryngopharynx**, as it is the structure that allows both air and food to pass through before they diverge into their respective pathways.

**Final Answer**: Laryngopharynx

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