Carapace occurs in

Options

A. Krait
B. Glass snake
C. Rattle snake
D. turtle

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the occurrence of the term "carapace" in relation to certain animals. We need to identify which of the given options has a carapace.

2. **Analyzing the Options**: The options provided are:
- Krait
- Glass snake
- Rattlesnake
- Turtle

3. **Defining Carapace**: A carapace is a hard shell that covers the back of certain animals, primarily found in reptiles and some other groups. It is an important part of the anatomy of certain species.

4. **Identifying the Correct Animal**:
- **Krait, Glass Snake, Rattlesnake**: These are all types of snakes. Snakes do not have a carapace; instead, they have scales covering their bodies.
- **Turtle**: Turtles have a shell that consists of two main parts: the upper part called the carapace and the lower part called the plastron.

5. **Conclusion**: Since the carapace is specifically a part of the turtle's anatomy, the correct answer to the question is **Turtle**.

### Final Answer:
The carapace occurs in **Turtle**.