The less amount of water is lost with the excretion of which nitrogenous product?

Options

A. `NH_(3)`
B. `NH_(3)` and uric acid
C. Urea and uric acid
D. `NH_(3)` and urea

Answer

To solve the question regarding which nitrogenous product results in the least amount of water loss during excretion, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Nitrogenous Waste Products**: The primary nitrogenous waste products in animals include ammonia (NH3), urea, and uric acid. Each of these has different properties and water requirements for excretion.

2. **Understand the Toxicity and Water Requirement**:
- **Ammonia (NH3)**: This is the most toxic form of nitrogenous waste. To safely excrete ammonia, a large amount of water is required to dilute it, which leads to significant water loss.
- **Urea**: This is less toxic than ammonia and requires less water for excretion compared to ammonia. However, it still requires a moderate amount of water.
- **Uric Acid**: This is the least toxic form of nitrogenous waste and is excreted as a paste or solid, which requires minimal water for excretion.

3. **Compare Water Loss**:
- Since ammonia requires the most water for excretion, it is not the answer.
- Urea requires less water than ammonia but more than uric acid.
- Uric acid requires the least amount of water for excretion, making it the most efficient in terms of water conservation.

4. **Conclusion**: Based on the analysis, the nitrogenous product that results in the least amount of water loss during excretion is **uric acid**.

### Final Answer:
The less amount of water is lost with the excretion of **uric acid**.