Which of the following is not a nitrogenous waste that must be excreted from the body?

Options

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

Explanation

To solve the question of which of the following is not a nitrogenous waste that must be excreted from the body, we can follow these steps:

### Step 1: Understand the Types of Nitrogenous Wastes
Nitrogenous wastes are products of protein metabolism that contain nitrogen. The main types of nitrogenous wastes include:
- **Ammonia**: Highly toxic and water-soluble, excreted by ammonotelic organisms.
- **Urea**: Less toxic than ammonia, excreted by ureotelic organisms.
- **Uric Acid**: Least toxic and excreted as a paste by uricotelic organisms.

### Step 2: Analyze the Options
The options provided are:
- **A) Uric Acid**
- **B) Feces**
- **C) Urea**
- **D) Ammonia**

### Step 3: Identify Which Option is Not a Nitrogenous Waste
- **Uric Acid (A)**: This is a nitrogenous waste.
- **Feces (B)**: This is not a nitrogenous waste; it consists of undigested food and other materials.
- **Urea (C)**: This is a nitrogenous waste.
- **Ammonia (D)**: This is also a nitrogenous waste.

### Step 4: Conclusion
From the analysis, we can conclude that **Feces (B)** is not a nitrogenous waste that must be excreted from the body.

### Final Answer
**B) Feces**

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