Reptile living on water as well as on land is

Options

A. Python
B. Sphenodon
C. Turtle/Tortoise
D. Frog.

Answer

To solve the question "Reptile living on water as well as on land is," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- A) Python
- B) Sphenodon
- C) Turtle or Tortoise
- D) Frog

2. **Analyze Each Option**:
- **Option A: Python**: Pythons are snakes that primarily inhabit terrestrial environments. They do not typically live in water, so this option can be ruled out.
- **Option B: Sphenodon**: Sphenodon, also known as tuatara, is a reptile that is strictly terrestrial. It does not live in water, so this option is also incorrect.
- **Option C: Turtle or Tortoise**: Turtles are reptiles that can live both in water and on land. They are adapted to aquatic environments but often come onto land for various reasons, such as nesting. Tortoises, while primarily land-dwelling, are also reptiles. Therefore, this option is a strong candidate.
- **Option D: Frog**: Frogs are amphibians, not reptiles. They are excluded from the options as they do not fall under the category of reptiles.

3. **Conclusion**: After analyzing all the options, the only reptiles that can live both in water and on land are turtles (and to some extent tortoises). Thus, the correct answer is **C) Turtle or Tortoise**.

### Final Answer:
The reptile living on water as well as on land is **C) Turtle or Tortoise**.