Frog is
Ureotelic
Uricotelic
Ammonotelic
None of the above

Options

A. Ureotelic
B. Uricotelic
C. Ammonotelic
D. None of the above

Answer

To determine the nitrogenous waste excretion method of frogs, we can analyze the options provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Ureotelic Organisms**:
- Ureotelic organisms are those that excrete urea as their primary nitrogenous waste. Urea is less toxic than ammonia and requires less water for excretion.
- Examples of ureotelic organisms include adult amphibians (like frogs), mammals, and some cartilaginous fishes.

2. **Understanding Uricotelic Organisms**:
- Uricotelic organisms excrete uric acid as their nitrogenous waste. Uric acid is the least toxic of the nitrogenous wastes and requires minimal water for its removal.
- Birds and reptiles are common examples of uricotelic organisms.

3. **Understanding Ammonotelic Organisms**:
- Ammonotelic organisms excrete ammonia as their nitrogenous waste. Ammonia is highly toxic and requires a large amount of water for its excretion.
- Most aquatic animals, including many fish and the larvae of amphibians, are ammonotelic.

4. **Identifying the Correct Option for Frogs**:
- Frogs, as adult amphibians, primarily excrete urea, which categorizes them as ureotelic.
- While their larvae (tadpoles) are ammonotelic, the adult frogs transition to ureotelism.

5. **Conclusion**:
- Based on the definitions and examples discussed, the correct answer is that frogs are **ureotelic**.

### Final Answer:
Frog is **Ureotelic**.

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