Which of the following is a monosaccharide?

Options

A. Lactose
B. Maltose
C. Glucose
D. Sucrose

Answer

To determine which of the following is a monosaccharide, we need to understand what a monosaccharide is and then analyze the given options.

### Step-by-Step Solution:

1. **Definition of Monosaccharide**:
- Monosaccharides are the simplest form of carbohydrates. They cannot be hydrolyzed into simpler sugars. Examples include glucose, galactose, and fructose.

2. **Understanding Hydrolysis**:
- Hydrolysis is a chemical process that breaks down compounds by adding water. Monosaccharides do not undergo hydrolysis to yield simpler sugars, which is a key characteristic.

3. **Analyzing the Options**:
- We need to look at the options provided and identify which one is a monosaccharide.

4. **Identifying Each Option**:
- **Lactose**: This is a disaccharide made up of glucose and galactose.
- **Maltose**: This is also a disaccharide made up of two glucose units.
- **Glucose**: This is a monosaccharide, as it is a single sugar unit.
- **Sucrose**: This is a disaccharide made up of glucose and fructose.

5. **Conclusion**:
- Among the options provided, the only monosaccharide is **glucose**.

### Final Answer:
The correct option is **glucose**.

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