In frog, oxygen dissolved in water can be taken by

Options

A. External nares
B. Spiracles
C. Buccal cavity
D. skin

Explanation

### Step-by-Step Solution:

1. **Understanding the Frog's Habitat**:
- Frogs are amphibians, meaning they can live both on land (terrestrial) and in water (aquatic). This dual habitat influences their respiration methods.

2. **Identifying Respiration Methods**:
- Frogs have three primary modes of respiration:
- **Pulmonary Respiration**: This occurs when frogs are on land, using their lungs to take in atmospheric air.
- **Buccopharyngeal Respiration**: This method is also used when frogs are on land, utilizing the moist and vascularized buccal cavity to absorb oxygen from the air.
- **Cutaneous Respiration**: This occurs when frogs are in water, allowing them to absorb oxygen directly through their skin.

3. **Focusing on Cutaneous Respiration**:
- In cutaneous respiration, the frog's skin plays a crucial role. The skin is thin and moist, allowing for efficient gas exchange. Oxygen dissolved in water can easily diffuse through the skin into the blood vessels, while carbon dioxide can diffuse out into the water.

4. **Conclusion**:
- Therefore, the correct answer to the question "In frog, oxygen dissolved in water can be taken by" is the skin.

### Final Answer:
- **The oxygen dissolved in water can be taken by the skin of the frog.**

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