Ketonuria is due to

Options

A. Intake of excess sugar
B. Diabetes insipidus
C. Diabetes mellitus
D. High blood pressure

Answer

### Step-by-Step Solution:

1. **Understanding Ketonuria**: Ketonuria is a condition characterized by the presence of ketones in the urine. Ketones are byproducts of fat and protein metabolism.

2. **Causes of Ketonuria**: The body produces ketones when it breaks down fats and proteins for energy, especially when glucose is not available. This typically occurs in certain metabolic conditions.

3. **Analyzing the Options**:
- **Option 1: Intake of Excess Sugar**: This is unlikely to cause ketonuria as excess sugar would lead to increased glucose levels, which would not necessitate the breakdown of fats or proteins.
- **Option 2: Diabetes Insipidus**: This condition primarily affects water balance and does not directly relate to ketone production.
- **Option 3: Diabetes Mellitus**: In this condition, the body’s cells do not receive enough glucose due to insulin issues, leading to the breakdown of fats and proteins for energy, resulting in ketone production.
- **Option 4: High Blood Pressure**: This condition does not directly influence ketone levels in the urine.

4. **Conclusion**: The correct answer is **Diabetes Mellitus**, as it is the condition that leads to the production of ketones due to the body’s inability to utilize glucose effectively.