Less oxygen due to high levels of carbon dioxide
is called

Options

A. Carbon monoxide poisoning
B. Asphyxia
C. Dyspnea
D. Apnoea

Answer

To solve the question "Less oxygen due to high levels of carbon dioxide is called," we will analyze the options provided and determine which one correctly describes this condition.

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking for a term that describes a situation where there is a low level of oxygen and a high level of carbon dioxide in the body.

2. **Analyzing the Options**:
- **Option A: Carbon Monoxide Poisoning**: This condition involves carbon monoxide, which binds to hemoglobin more effectively than oxygen, leading to a lack of oxygen in the tissues. Since the question specifically mentions carbon dioxide, this option is not correct.

- **Option B: Asphyxia**: Asphyxia is a condition characterized by insufficient oxygen and an excess of carbon dioxide. It can occur due to choking, drowning, or any obstruction in the airway. This matches the description in the question, making it a strong candidate for the answer.

- **Option C: Dyspnea**: Dyspnea refers to difficulty in breathing or shortness of breath. While it can be associated with low oxygen levels, it does not specifically refer to the condition of having high carbon dioxide levels. Thus, this option is not correct.

- **Option D: Apnea**: Apnea is the cessation of breathing, which does not directly relate to the levels of oxygen or carbon dioxide in the body. Therefore, this option is also incorrect.

3. **Conclusion**: After analyzing all the options, the correct answer is **Option B: Asphyxia**. This term accurately describes the condition of having less oxygen due to high levels of carbon dioxide.

### Final Answer:
Less oxygen due to high levels of carbon dioxide is called **Asphyxia**.

---