The respiratory pigment in human beings is

Options

A. Carotene
B. Chlorophyll
C. Haemoglobin
D. Xanthophyll

Explanation

To solve the question regarding the respiratory pigment in human beings, we will analyze each option provided and determine which one is correct.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Carotene
- B) Chlorophyll
- C) Hemoglobin
- D) Xanthophyll

2. **Analyze Option A: Carotene**:
- Carotene is a pigment primarily found in plants and is responsible for the orange color in carrots and other vegetables. It is not present in human beings and does not function as a respiratory pigment.
- **Conclusion**: Incorrect.

3. **Analyze Option B: Chlorophyll**:
- Chlorophyll is the green pigment found in plants, essential for photosynthesis, which is the process by which plants convert sunlight into energy. Humans do not perform photosynthesis, so chlorophyll is not relevant to human respiration.
- **Conclusion**: Incorrect.

4. **Analyze Option C: Hemoglobin**:
- Hemoglobin is a protein found in red blood cells of humans and is responsible for transporting oxygen from the lungs to the rest of the body. It binds with oxygen to form oxyhemoglobin and plays a crucial role in respiration.
- **Conclusion**: Correct.

5. **Analyze Option D: Xanthophyll**:
- Xanthophyll is another pigment found in plants, contributing to the yellow color in leaves. Similar to carotene and chlorophyll, it does not play a role in human respiration.
- **Conclusion**: Incorrect.

6. **Final Answer**: Based on the analysis, the correct answer to the question "The respiratory pigment in human beings is" is **C) Hemoglobin**.