Cochlea is divided into three chambers or spaces
1. Scala vestibuli 2. Scala media 3. Scala tympani
Basilar membrane and Reissner's membrane are respectively found between

Options

A. (i) and (iii) and (i) & (ii)
B. (i), (ii) and (iii)
C. (ii) & (iii) and (i) & (iii)
D. (ii) and (iii) and (i) & (ii)

Answer

To solve the question regarding the cochlea and the positioning of the Basilar membrane and Reissner's membrane, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Cochlea**:
- The cochlea is a spiral-shaped structure in the inner ear, divided into three chambers: Scala Vestibuli, Scala Media, and Scala Tympani.

2. **Identify the Membranes**:
- The Basilar membrane and Reissner's membrane are two important membranes within the cochlea.
- The Basilar membrane forms the base of the cochlea.
- The Reissner's membrane forms the roof of the cochlea.

3. **Determine the Locations of the Membranes**:
- **Reissner's Membrane**: This membrane is located between the Scala Vestibuli and Scala Media.
- **Basilar Membrane**: This membrane is located between the Scala Media and Scala Tympani.

4. **Conclude the Relationships**:
- Therefore, the Reissner's membrane is found between the first (Scala Vestibuli) and second (Scala Media) chambers.
- The Basilar membrane is found between the second (Scala Media) and third (Scala Tympani) chambers.

5. **Select the Correct Options**:
- The correct answer to the question is that Reissner's membrane is between Scala Vestibuli and Scala Media, while Basilar membrane is between Scala Media and Scala Tympani.

### Final Answer:
- Reissner's membrane is found between Scala Vestibuli and Scala Media.
- Basilar membrane is found between Scala Media and Scala Tympani.