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 need to identify the correct terms for the tough outer layer and the inner vascularized layer.

### Step-by-Step Solution:

1. **Identify the protective layers of the brain**: The brain is protected by three layers known as the meninges. These layers are:
- Dura mater (outer layer)
- Arachnoid mater (middle layer)
- Pia mater (inner layer)

2. **Determine the tough protective layer**: The outermost layer, which is tough and provides protection to the brain, is called the **Dura mater**. This layer is thick and durable, serving as the first line of defense against physical impacts.

3. **Identify the inner highly vascularized layer**: The innermost layer, which is highly vascularized and closely adheres to the surface of the brain, is known as the **Pia mater**. This layer contains many blood vessels that supply nutrients to the brain.

4. **Combine the answers**: Based on the identification of the layers:
- (i) The tough protective layer of the brain is **Dura mater**.
- (ii) The inner highly vascularized protective layer is **Pia mater**.

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

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