Which of the following is a histopathological examination ?

Options

A. Computed tomography
B. MRI
C. X - rays
D. Biopsy

Answer

To determine which of the following options is a histopathological examination, we need to understand what histopathology is and the methods used for such examinations.

### Step-by-Step Solution:

1. **Understand Histopathology**: Histopathology is the study of tissue samples to diagnose diseases. It involves examining tissues under a microscope to identify any abnormalities or diseases.

2. **Identify the Options**: The options provided are:
- Computed Tomography (CT)
- MRI (Magnetic Resonance Imaging)
- X-rays
- Biopsy

3. **Analyze Each Option**:
- **Computed Tomography (CT)**: This is an imaging technique that uses X-rays to create detailed images of the body. It is not a histopathological examination.
- **MRI**: This is another imaging technique that uses magnetic fields and radio waves to create images of organs and tissues. It is also not a histopathological examination.
- **X-rays**: This is a form of electromagnetic radiation used to create images of the inside of the body. Like CT and MRI, it is not a histopathological examination.
- **Biopsy**: This procedure involves taking a small sample of tissue from the body for examination. This is the primary method used in histopathology to diagnose diseases.

4. **Conclusion**: Among the given options, the only method that qualifies as a histopathological examination is **Biopsy**.

### Final Answer:
**Biopsy** is the correct answer as it is a histopathological examination.