Which of the following sugars is levorotatory ?

Options

A. Fructose
B. Glucose
C. Maltose
D. Galactose

Answer

To determine which of the following sugars is levorotatory, we need to understand what levorotatory means and then analyze the options given: fructose, glucose, maltose, and galactose.

### Step-by-Step Solution:

1. **Understand Levorotatory**:
- Levorotatory (often abbreviated as "levorotatory" or "l-") refers to a substance that rotates plane-polarized light to the left (anticlockwise). This is in contrast to dextrorotatory substances, which rotate light to the right (clockwise).

2. **Identify the Sugars**:
- The sugars in question are:
- Fructose
- Glucose
- Maltose
- Galactose

3. **Research Each Sugar**:
- **Fructose**: Known to be levorotatory.
- **Glucose**: Typically dextrorotatory.
- **Maltose**: A disaccharide derived from glucose, also dextrorotatory.
- **Galactose**: Generally dextrorotatory.

4. **Conclusion**:
- Among the sugars listed, fructose is the only one that is levorotatory. Therefore, the answer is **fructose**.

### Final Answer:
**Fructose is the levorotatory sugar among the options given.**

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