the animals having parenchyma in space between body wall and gut is

Options

A. Echincocus
B. Echinus
C. Enterobius
D. Eunice

Answer

To solve the question regarding which animals have parenchyma in the space between the body wall and gut, we can follow these steps:

### Step 1: Understand the term "parenchyma"
Parenchyma refers to the tissue that fills the space between the body wall and the gut in certain organisms. It is a characteristic feature of certain groups of animals, particularly those in the phylum Platyhelminthes (flatworms).

### Step 2: Identify the options given
The options provided are:
- Echinococcus
- Echinus
- Enterobius
- Eunus

### Step 3: Analyze each option
1. **Echinococcus**: This is a genus of parasitic tapeworms known as cyclophyllid tapeworms. They are triploblastic and possess parenchyma between their body wall and gut.

2. **Echinus**: This refers to sea urchins, which belong to the phylum Echinodermata. They do not have parenchyma as described in the question.

3. **Enterobius**: This is a genus of pinworms, which are nematodes (roundworms). They do not have parenchyma.

4. **Eunus**: This is not a commonly recognized term in relation to the question and does not refer to a specific group of animals with parenchyma.

### Step 4: Conclusion
Based on the analysis, the correct answer is **Echinococcus**, as they are the only ones among the options that have parenchyma in the space between the body wall and gut.

### Final Answer:
The animals having parenchyma in the space between the body wall and gut is **Echinococcus**.

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