Raffinose has three monosaccharide units those are

Options

A. (a) Glucose , pentose and maltose
B. (b) Glucose , levulose and galactose
C. (c) Glucose, fructose and sucrose
D. (d) Fructose , fructose and galactose

Answer

### Step-by-Step Solution:

1. **Understanding Raffinose**: Raffinose is a type of carbohydrate known as a trisaccharide, which means it is made up of three monosaccharide units.

2. **Identifying the Monosaccharides**: The three monosaccharides that make up raffinose are:
- **Galactose**
- **Glucose**
- **Fructose** (also known as levulose)

3. **Chemical Structure**: The chemical formula of raffinose is C18H32O16, which indicates the presence of these three monosaccharides in its structure.

4. **Nutritional Value**: Raffinose is found abundantly in various plants such as beans, cabbage, broccoli, and sugar beets. It acts as a prebiotic, helping to maintain gut flora and support immunity.

5. **Choosing the Correct Option**: Among the provided options:
- A: Glucose, Pentose, and Maltose (Incorrect)
- B: Glucose, Levulose, and Galactose (Correct, as levulose is another name for fructose)
- C: Glucose, Fructose, and Sucrose (Incorrect)
- D: Fructose, Fructose, and Galactose (Incorrect)

The correct answer is **Option B**: Glucose, Levulose (Fructose), and Galactose.