Identify poikilotherms.
(i) Elephants `" "` (ii) Frogs
(iii) Sharks `" "` (iv) Whales .

Options

A. (i), (ii)
B. (ii) , (iv)
C. (ii),(iii)
D. (iii) , (iv)

Answer

To identify poikilotherms from the given options, we need to understand the definition of poikilotherms and the classification of the animals listed.

### Step-by-Step Solution:

1. **Understand Poikilotherms**: Poikilotherms, also known as cold-blooded animals, are organisms whose body temperature varies with the temperature of their environment. They do not have the ability to regulate their body temperature internally.

2. **Analyze the Options**:
- **(i) Elephants**: Elephants are mammals. Mammals are warm-blooded animals (homeotherms) that maintain a constant body temperature regardless of the environment.
- **(ii) Frogs**: Frogs are amphibians. Amphibians are classified as poikilotherms because their body temperature changes with the environment.
- **(iii) Sharks**: Sharks are classified as fish. Fish are also considered poikilotherms as their body temperature is influenced by the surrounding water temperature.
- **(iv) Whales**: Whales are mammals and, like elephants, are warm-blooded. They maintain a constant body temperature.

3. **Identify Poikilotherms**: From the analysis:
- Frogs (ii) and Sharks (iii) are poikilotherms.
- Elephants (i) and Whales (iv) are not poikilotherms; they are warm-blooded.

4. **Final Answer**: The poikilotherms from the options provided are:
- Frogs (ii)
- Sharks (iii)