Balancing organ of molluscs is

Options

A. Lithocyst
B. Osphradium
C. Statocyst
D. Tentaculocyst

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the balancing organ of molluscs, which is essential for their orientation and swimming ability in water.

2. **Identifying the Options**: The options provided include:
- Lithocyst
- Osphradium
- Stratosis
- Tentaculosis

3. **Analyzing Each Option**:
- **Lithocyst**: This is not a balancing organ; it is involved in storing calcium.
- **Osphradium**: This organ functions as a chemoreceptor, helping molluscs detect changes in their environment, such as pH and salinity, but it does not help with balance.
- **Stratosis**: This is identified as the balancing organ of molluscs, crucial for maintaining orientation and aiding in swimming.
- **Tentaculosis**: This refers to sensory organs located in tentacles, which help detect food and vibrations but are not related to balance.

4. **Conclusion**: The correct answer is **Stratosis**, as it is specifically mentioned as the balancing organ that allows molluscs to swim effectively.

### Final Answer:
The balancing organ of molluscs is **Stratosis**.

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