Piamater is :

Options

A. Inner most meninge
B. Middle meninge
C. Outer meninge
D. None

Answer

**Step-by-Step Solution:**

1. **Identify the Context**: The question asks about "Piamater," which is related to the layers of the meninges in the human body.

2. **Define Pia Mater**: Pia mater is one of the three layers of the meninges, which are protective membranes covering the brain and spinal cord.

3. **Describe its Characteristics**:
- Pia mater is the innermost layer of the meninges.
- It is a delicate and thin fibrous tissue.
- It is impermeable to cerebrospinal fluid, meaning it does not allow this fluid to pass through it.

4. **Explain its Functions**:
- It provides protection to the outer layers of the meninges.
- It acts as a cushion for the brain.
- It allows blood vessels to pass through, which nourish the brain.

5. **Conclude the Answer**: Based on the characteristics and functions described, the answer to the question "Piamater is:" is that it is the innermost layer of the meninges.

**Final Answer**: Pia mater is the innermost layer of the meninges.

---