In pila, the chemoreceptor organ is

Options

A. Ctenidium
B. Odontophore
C. Osphradium
D. Radula

Answer

To answer the question regarding the chemoreceptor organ in Pila, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organ**: We need to determine which organ in Pila functions as a chemoreceptor.

2. **Understand the Functions of Chemoreceptors**: Chemoreceptors are specialized organs that detect changes in the environment, such as temperature, salinity, and pH levels.

3. **Review the Options**: The options provided include:
- **Tinidium**: An organ involved in feeding and gas exchange.
- **Odontophore**: A structure that supports the radula, which is a rasping organ.
- **Osphradium**: An organ that assists in the feeding mechanism and is known to function as a chemoreceptor.
- **Radula**: A rasping organ that functions similarly to a tongue.

4. **Analyze Each Option**:
- **Tinidium** does not serve as a chemoreceptor.
- **Odontophore** is not a chemoreceptor but supports the radula.
- **Osphradium** is specifically mentioned as a chemoreceptor organ that detects environmental changes.
- **Radula** is primarily for feeding and does not function as a chemoreceptor.

5. **Select the Correct Answer**: Based on the analysis, the correct answer is **Osphradium**, as it is the organ in Pila that acts as a chemoreceptor.

### Final Answer:
The chemoreceptor organ in Pila is **Osphradium**.

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