Which of the following is found in Mollusca ?

Options

A. Madreporite
B. Tube feet
C. Tiedemann's body
D. Osphradium

Answer

To determine which of the following is found in Mollusca, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Mollusca**:
- Mollusca is the second largest phylum in the animal kingdom, consisting of soft-bodied organisms. Common examples include snails, clams, and squids. They typically have a coelom and a body divided into three main parts: the head-foot, the visceral mass, and the mantle.

2. **Analyzing the Options**:
- **Option A: Madriperite**:
- Madriperite is a perforated diaphragm found in echinoderms, not in Mollusca. Therefore, this option is incorrect.

- **Option B: Tube Feet**:
- Tube feet are also characteristic of echinoderms, such as starfish. They are not found in Mollusca. Hence, this option is incorrect.

- **Option C: Tidemons Body**:
- The term "Tidemons Body" does not correspond to any known structure in Mollusca. This option is also incorrect.

- **Option D: Phradium**:
- Phradium is a sensory organ that helps in olfactory sensation and is indeed found in Mollusca. This makes it the correct option.

3. **Conclusion**:
- After analyzing all the options, the correct answer is **Option D: Phradium**.

### Final Answer:
The correct option that is found in Mollusca is **Phradium**.

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