Which among the following has four chambered heart?

Options

A. Vipera
B. Crocodilus
C. Testudo
D. Hermidactylus

Answer

To determine which among the given options has a four-chambered heart, we can analyze each option based on their classification and characteristics.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Viper
- Crocodilus (Crocodile)
- Testudo (Tortoise)
- Hemidactylus (Common Lizard)

2. **Understand the General Characteristics of Reptiles**: Most reptiles have a three-chambered heart, which consists of two atria and one ventricle. However, there are exceptions.

3. **Analyze Each Option**:
- **Viper**: This is a type of snake, which is a reptile. Snakes, including vipers, typically have a three-chambered heart. Therefore, this option is incorrect.
- **Crocodilus (Crocodile)**: Crocodiles are unique among reptiles as they possess a four-chambered heart. This heart consists of two atria and two ventricles, allowing for more efficient circulation. This option is correct.
- **Testudo (Tortoise)**: Tortoises are also reptiles and generally have a three-chambered heart. Thus, this option is incorrect.
- **Hemidactylus (Common Lizard)**: Like the other reptiles mentioned, common lizards also have a three-chambered heart. Therefore, this option is incorrect.

4. **Conclusion**: Based on the analysis, the only option that has a four-chambered heart is **Crocodilus (Crocodile)**.

### Final Answer:
The organism that has a four-chambered heart among the given options is **Crocodilus (Crocodile)**.

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