Which of the following part in ear is filled with endolymph ?

Options

A. scala tympani
B. scala media
C. scala vestibule
D. Helicoterma

Answer

To solve the question "Which of the following part in ear is filled with endolymph?", we will analyze the different parts of the ear and the fluids they contain.

### Step-by-Step Solution:

1. **Identify the Parts of the Ear**:
- The ear has three main compartments in the cochlea: Scala Vestibuli, Scala Media, and Scala Tympani.

2. **Understand the Fluids in the Ear**:
- There are two main types of fluids in these compartments:
- **Perilymph**: Found in the Scala Vestibuli and Scala Tympani.
- **Endolymph**: Found in the Scala Media.

3. **Analyze Each Option**:
- **Scala Tympani**: This compartment is filled with perilymph.
- **Scala Media**: This compartment is filled with endolymph.
- **Scala Vestibuli**: This compartment is also filled with perilymph.
- **Helicotrema**: This is the connection between Scala Vestibuli and Scala Tympani and contains perilymph.

4. **Conclusion**:
- Since the question asks for the part of the ear that is filled with endolymph, the correct answer is **Scala Media**.

### Final Answer:
The part of the ear that is filled with endolymph is **Scala Media**.

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