Which of the following pairs is not correctly matched?

Options

A. Frog : respiration through lungs
B. Earthworm : respiration through skin
C. Whale : respiration through gills
D. Snakes : respiration through lungs

Explanation

To determine which of the following pairs is not correctly matched, we will analyze each option regarding the respiration method of the animals mentioned.

### Step-by-Step Solution:

1. **Option A: Frog respiration through lung**
- Frogs are amphibians that can respire through both their skin and lungs. While they do have lungs, they primarily rely on cutaneous respiration (through their skin) when they are in water. However, they can also breathe using their lungs when on land.
- **Conclusion**: This option is partially correct, but it does not fully represent the frog's respiration method.

2. **Option B: Earthworm respiration through skin**
- Earthworms respire through their moist, thin skin. They do not have lungs or gills, and their skin must remain moist for gas exchange to occur.
- **Conclusion**: This option is correct.

3. **Option C: Whale respiration through gills**
- Whales are mammals and breathe air through lungs, not gills. They have nostrils (blowholes) on the top of their heads through which they breathe.
- **Conclusion**: This option is incorrect, as whales do not respire through gills.

4. **Option D: Snake respiration through lung**
- Snakes are reptiles that possess lungs and breathe air through their nostrils. They do not have gills.
- **Conclusion**: This option is correct.

### Final Answer:
The pair that is not correctly matched is **Option C: Whale respiration through gills**.

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