Which of the following pairs belong to the category of cold blooded animals?

Options

A. Snakes and birds
B. Bat and rats
C. Frog and snakes
D. Birds and monkey

Explanation

To determine which pairs belong to the category of cold-blooded animals, we need to identify the characteristics of cold-blooded animals and analyze the given pairs.

### Step-by-Step Solution:

1. **Understand Cold-Blooded Animals**:
- Cold-blooded animals, also known as poikilotherms or ectotherms, are organisms whose body temperature fluctuates with the environment. They do not have a constant internal body temperature.

2. **Analyze the Given Options**:
- **Option 1**: Snakes and Birds
- **Option 2**: Bat and Rats
- **Option 3**: Frog and Snakes
- **Option 4**: Birds and Monkey

3. **Identify Cold-Blooded Animals in Each Option**:
- **Option 1**: Snakes are cold-blooded, but birds are warm-blooded (homeothermic).
- **Option 2**: Bats and rats are both warm-blooded mammals.
- **Option 3**: Frogs are cold-blooded, and snakes are also cold-blooded.
- **Option 4**: Birds are warm-blooded, and monkeys are also warm-blooded.

4. **Eliminate Incorrect Options**:
- From the analysis:
- Option 1 is incorrect (contains a warm-blooded animal).
- Option 2 is incorrect (both are warm-blooded).
- Option 4 is incorrect (both are warm-blooded).
- Option 3 is correct (both are cold-blooded).

5. **Conclusion**:
- The correct pair that belongs to the category of cold-blooded animals is **Option 3: Frog and Snakes**.

### Final Answer:
The pair that belongs to the category of cold-blooded animals is **Frog and Snakes**.