The correct sequence of meninges from the inner to the outer side is :

Options

A. Duramater `rarr` arachnoid membrane `rarr` piamater
B. Duramater `rarr` piamater `rarr` arachnoid membrane
C. Piamater `rarr` arachnoid membrane `rarr` duramater
D. Arachnoid member `rarr` duramater `rarr` piamater

Answer

To determine the correct sequence of the meninges from the inner to the outer side, we need to understand the structure and order of the three layers that protect the brain and spinal cord. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Meninges
The meninges are the protective membranes that cover the brain and spinal cord. There are three layers of meninges:
1. **Pia Mater** (innermost layer)
2. **Arachnoid Mater** (middle layer)
3. **Dura Mater** (outermost layer)

### Step 2: Understand the Order of the Meninges
- **Pia Mater**: This is the innermost layer that is directly attached to the surface of the brain and spinal cord. It is thin and delicate.
- **Arachnoid Mater**: This is the middle layer that lies above the pia mater. It has a web-like appearance and is separated from the pia mater by the subarachnoid space, which contains cerebrospinal fluid (CSF).
- **Dura Mater**: This is the outermost layer that provides the most protection. It is tough and thick, lying beneath the skull and vertebral column.

### Step 3: Sequence from Inner to Outer
Based on the above understanding, the correct sequence of the meninges from inner to outer is:
1. **Pia Mater** (innermost)
2. **Arachnoid Mater** (middle)
3. **Dura Mater** (outermost)

### Conclusion
Thus, the correct answer to the question is:
- **Pia Mater → Arachnoid Mater → Dura Mater**