Chief nitrogenous waste product in frog is

Options

A. Ammonia
B. Urea
C. Uric acid
D. Allantoin

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for the chief nitrogenous waste product in frogs. Nitrogenous waste products are the byproducts of protein metabolism that need to be excreted from the body.

2. **Analyze the Options**: We have four options to consider: Ammonia, Urea, Uric Acid, and Allantoin.

3. **Evaluate Each Option**:
- **Ammonia**: This is primarily the nitrogenous waste product in aquatic animals like fish, which excrete ammonia directly into the water. Therefore, this option is incorrect for frogs.
- **Urea**: Frogs, being amphibians, primarily excrete urea as their chief nitrogenous waste product. This option is correct.
- **Uric Acid**: This is the main nitrogenous waste product in reptiles and birds. It is not the primary waste product in frogs, making this option incorrect.
- **Allantoin**: This is not a nitrogenous waste product; rather, it is a compound used in various medical applications, including skin moisturizers. Thus, this option is also incorrect.

4. **Conclusion**: Based on the evaluation of the options, the chief nitrogenous waste product in frogs is **Urea**.

**Final Answer**: Urea

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