Arterial heart is found in :

Options

A. Fish
B. Prawn
C. Earthworm
D. Frog

Answer

To solve the question "Arterial heart is found in:", we will analyze the options provided and determine which organism possesses an arterial heart.

### Step-by-Step Solution:

1. **Understanding the term "Arterial Heart":**
- An arterial heart refers to a heart structure that primarily consists of arteries and is typically found in certain invertebrates and some lower vertebrates.

2. **Evaluating the first option: Fish**
- Fish possess a two-chambered heart, which consists of one atrium and one ventricle. Therefore, fish do not have an arterial heart.
- **Conclusion:** Incorrect option.

3. **Evaluating the second option: Prawn**
- Prawns, which are crustaceans, have an arterial heart. Their circulatory system is open, and they possess a heart that pumps hemolymph (a fluid equivalent to blood) through arteries.
- **Conclusion:** Correct option.

4. **Evaluating the third option: Earthworm**
- Earthworms have a closed circulatory system with five pairs of aortic arches, which function similarly to a heart but are not classified as an arterial heart.
- **Conclusion:** Incorrect option.

5. **Evaluating the fourth option: Frog**
- Frogs have a three-chambered heart, consisting of two atria and one ventricle. This structure does not qualify as an arterial heart.
- **Conclusion:** Incorrect option.

### Final Answer:
The correct answer is **Prawn** (Option 2), as it is the only organism listed that possesses an arterial heart.

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