In which animal , there is post-anal tail as well as heterodont teeth

Options

A. Scorpion
B. Krait
C. Elephant
D. Cobra.

Answer

To answer the question regarding which animal possesses both a post-anal tail and heterodont teeth, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Post-anal Tail**: This is a tail that extends beyond the anus. It is a characteristic feature of all vertebrates during some stage of their development.
- **Heterodont Teeth**: These are teeth that are differentiated into various types, such as incisors, canines, premolars, and molars. This feature is primarily found in mammals.

2. **Analyzing the Options**:
- **Scorpion**: Scorpions are arachnids and do not possess a post-anal tail or heterodont teeth. They lack both characteristics.
- **Krait**: Kraits are snakes (reptiles) and, while they have a post-anal tail, they do not have heterodont teeth. Snakes generally have homodont teeth, meaning all their teeth are similar.
- **Cobra**: Similar to kraits, cobras are also reptiles. They have a post-anal tail but lack heterodont teeth, as they possess homodont teeth.
- **Elephant**: Elephants are mammals. They have a post-anal tail and possess heterodont teeth, which include incisors (tusks), canines, premolars, and molars.

3. **Conclusion**:
- The only animal from the given options that has both a post-anal tail and heterodont teeth is the **elephant**.

### Final Answer:
The correct option is **elephant**.

---