High carboxyhaemoglobin content indicates that the patient has inhaled excess of

Options

A. A) carbon disulphide
B. B) chloroform
C. C) carbon dioxide
D. D) carbon monoxide

Explanation

To solve the question regarding high carboxyhemoglobin content in a patient, we will analyze each option provided and determine which substance leads to this condition.

### Step-by-Step Solution:

1. **Understanding Carboxyhemoglobin**:
- Carboxyhemoglobin is a compound formed when carbon monoxide (CO) binds to hemoglobin in the blood. This reduces the blood's ability to carry oxygen.

2. **Analyzing the Options**:
- **Option A: Carbon Disulfide**:
- This is a chemical compound used in industrial applications, but it does not form carboxyhemoglobin.
- **Option B: Chloroform**:
- Chloroform is an organic compound that can cause various health issues but does not lead to the formation of carboxyhemoglobin.
- **Option C: Carbon Dioxide**:
- While carbon dioxide is a normal component of respiration, it does not lead to the formation of carboxyhemoglobin.
- **Option D: Carbon Monoxide**:
- Carbon monoxide is known to bind with hemoglobin to form carboxyhemoglobin, leading to reduced oxygen transport in the body.

3. **Conclusion**:
- Based on the analysis, high carboxyhemoglobin content indicates that the patient has inhaled excess of **carbon monoxide (Option D)**.

### Final Answer:
The correct answer is **Option D: Carbon Monoxide**.

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