Which one of the following is not normally excreted in urine?

Options

A. Uric acid
B. Haemoglobin
C. ketone bodies
D. Hipuuric acid

Explanation

To solve the question "Which one of the following is not normally excreted in urine?", we will analyze the options provided: uric acid, hemoglobin, ketone bodies, and hypuric acid.

### Step-by-Step Solution:

1. **Identify the Excretory Products**:
- Begin by identifying which substances are typically excreted in urine. Common excretory products include uric acid, ketone bodies, and hypuric acid. These are metabolic waste products that the body eliminates through urine.

2. **Analyze Each Option**:
- **Uric Acid**: This is a waste product formed from the breakdown of purines and is normally excreted in urine.
- **Ketone Bodies**: These are produced during the metabolism of fats and are also excreted in urine, especially in conditions like diabetes or fasting.
- **Hypuric Acid**: This is a derivative of uric acid and is generally excreted in urine as well.
- **Hemoglobin**: This is a protein found in red blood cells responsible for transporting oxygen. It is not a waste product and is not normally excreted in urine.

3. **Determine the Correct Answer**:
- Since uric acid, ketone bodies, and hypuric acid are all normal components of urine, while hemoglobin is not, the answer to the question is **hemoglobin**.

4. **Explain the Abnormality**:
- If hemoglobin is found in urine, it indicates a medical condition known as hemoglobinuria, which can occur due to various reasons such as hemolysis or severe anemia. This is not a normal physiological process.

### Final Answer:
The substance that is not normally excreted in urine is **hemoglobin**.

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