The tough protective layer of brain is …..(i).... and inner highly vascularised protective layer is …..(ii) …..

Options

A. i : Piamater and ii : duramater
B. i : duramater and ii : Piamater
C. i : duramater and ii : arachnoid
D. i : Piamater and ii : sub-dural space

Answer

To solve the question regarding the protective layers of the brain, we will identify the layers and their characteristics step by step.

### Step-by-Step Solution:

1. **Understanding the Protective Layers of the Brain**:
- The brain is covered by three protective layers known as meninges. These layers are:
- **Dura Mater** (outer layer)
- **Arachnoid Mater** (middle layer)
- **Pia Mater** (inner layer)

2. **Identifying the Tough Protective Layer**:
- The **Dura Mater** is the outermost layer and is known for being tough and protective. It is made of dense fibrous tissue, providing a strong barrier against physical impacts.

3. **Identifying the Inner Highly Vascularized Protective Layer**:
- The **Pia Mater** is the innermost layer of the meninges. It is highly vascularized, meaning it contains many blood vessels. This layer closely adheres to the surface of the brain and supplies it with blood.

4. **Final Answers**:
- (i) The tough protective layer of the brain is **Dura Mater**.
- (ii) The inner highly vascularized protective layer is **Pia Mater**.

5. **Choosing the Correct Option**:
- From the options provided, the correct pairing is **Dura Mater and Pia Mater**. This matches the second option given in the question.

### Final Answer:
(i) Dura Mater
(ii) Pia Mater