The membranes enclosing the brain is known as

Options

A. meninges
B. meningitis
C. nephron
D. axon

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for the name of the membranes that enclose the brain.

2. **Understanding the Options**: The options given are:
- Meninges
- Meningitis
- Nephron
- Axon

3. **Define Each Term**:
- **Meninges**: These are the protective membranes that cover the brain and spinal cord.
- **Meningitis**: This is an inflammation of the meninges, usually caused by an infection.
- **Nephron**: This is the functional unit of the kidney, unrelated to the brain.
- **Axon**: This is a part of a neuron that transmits impulses away from the cell body, also unrelated to the membranes covering the brain.

4. **Identify the Correct Answer**: Since the question specifically asks for the membranes enclosing the brain, the correct answer is **Meninges**.

5. **Explanation of Meninges**: The meninges consist of three layers:
- **Dura Mater**: The outermost layer, tough and protective.
- **Arachnoid Mater**: The middle layer, which is web-like and cushions the brain.
- **Pia Mater**: The innermost layer, which is delicate and closely adheres to the surface of the brain.

6. **Conclusion**: Therefore, the membranes enclosing the brain are known as **Meninges**.