Which one of the following has nuclei in its mature red blood corpuscles ?

Options

A. Cow
B. Horse
C. Camel
D. None of the above .

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which organism has nuclei in its mature red blood corpuscles (RBCs). We need to analyze the options given.

2. **Identifying the Options**: The options provided are:
- Option 1: Cow
- Option 2: Horse
- Option 3: Camel
- Option 4: None of the above

3. **General Knowledge of Mammalian RBCs**: In mammals, mature red blood cells are typically non-nucleated. This is a key characteristic of mammalian erythrocytes, as during the process of erythropoiesis, the nucleus is expelled from the cell to maximize space for hemoglobin.

4. **Analyzing Each Option**:
- **Cow**: As a mammal, cows have non-nucleated RBCs.
- **Horse**: Horses, being mammals, also have non-nucleated RBCs.
- **Camel**: Camels, like other mammals, have non-nucleated RBCs as well.

5. **Conclusion**: Since all the options provided (cow, horse, camel) are mammals and do not have nucleated RBCs, the correct answer must be "none of the above."

6. **Final Answer**: The correct answer is **None of the above**.