Three chambered heart is found in `:-`

Options

A. Fish
B. Frog
C. Rabbit
D. Man

Answer

**Step-by-Step Solution:**

1. **Understand the Structure of Hearts in Different Organisms:**
- The heart structure varies among different organisms, and it has evolved over time.
- The simplest form is a single-chambered heart, which is found in primitive chordates.

2. **Identify the Types of Hearts:**
- **Single-Chambered Heart:** Found in organisms like amphioxus.
- **Two-Chambered Heart:** Found in fish, which have one atrium and one ventricle.
- **Three-Chambered Heart:** Found in amphibians such as frogs, which have two atria and one ventricle.
- **Four-Chambered Heart:** Found in mammals (including humans) and birds, which have two atria and two ventricles.

3. **Analyze the Given Options:**
- **Fish:** Have a two-chambered heart (incorrect).
- **Frog:** Have a three-chambered heart (correct).
- **Rabbit:** Have a four-chambered heart (incorrect).
- **Man:** Have a four-chambered heart (incorrect).

4. **Conclusion:**
- Based on the analysis, the organism that has a three-chambered heart from the given options is the frog.

**Final Answer:** The three-chambered heart is found in **Frog**.

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