The animal which can breathe through the lungs as well as through skin is :

Options

A. fish
B. dolphin
C. frog
D. crocodile

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for an animal that can breathe through both lungs and skin. This means we need to identify an animal that has two different methods of respiration.

2. **Analyzing the Options**:
- **Fish**: Fish breathe through gills, which extract oxygen from water. They do not breathe through lungs or skin.
- **Dolphin**: Dolphins are mammals and breathe through lungs. They do not breathe through skin.
- **Frog**: Frogs are amphibians that can live both in water and on land. They have lungs for breathing air when on land and can also absorb oxygen through their skin when in water.
- **Crocodile**: Crocodiles are reptiles and primarily breathe through lungs; they do not breathe through skin.

3. **Identifying the Correct Answer**: Among the options analyzed, the frog is the only animal that can breathe through both lungs (on land) and skin (in water).

4. **Conclusion**: The correct answer to the question is **frog**.

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