Among the following, the incorrect statement is:

Options

A. Cellulose and amylose have 1,4-glycosidic linkage
B. Lactose contains `beta`-D-galactose and `beta`-D-glucose
C. Maltose and lactose have 1,4-glycosidic linkage
D. Sucrose and amylose have 1,2-glycosidic linkage

Explanation

To determine the incorrect statement among the given options, we will analyze each statement regarding glycosidic linkages in the biomolecules mentioned.

### Step-by-step Solution:

1. **Option 1: Cellulose and amylose have 1,4 glycosidic linkage.**
- **Analysis:**
- Cellulose is a polysaccharide composed of beta-D-glucose units linked by 1,4-glycosidic bonds.
- Amylose, a component of starch, is made up of alpha-D-glucose units also linked by 1,4-glycosidic bonds.
- **Conclusion:** This statement is **correct**.

2. **Option 2: Lactose contains beta-D-galactose and beta-D-glucose.**
- **Analysis:**
- Lactose is a disaccharide composed of one beta-D-galactose and one beta-D-glucose unit.
- **Conclusion:** This statement is **correct**.

3. **Option 3: Maltose and lactose have 1,4-glycosidic linkage.**
- **Analysis:**
- Maltose is a disaccharide made of two alpha-D-glucose units linked by a 1,4-glycosidic bond.
- Lactose, as previously mentioned, is made of beta-D-galactose and beta-D-glucose, also linked by a 1,4-glycosidic bond.
- **Conclusion:** This statement is **correct**.

4. **Option 4: Sucrose and amylose have 1,2-glycosidic linkage.**
- **Analysis:**
- Sucrose is a disaccharide composed of glucose and fructose linked by a 1,2-glycosidic bond.
- Amylose, as established, has a 1,4-glycosidic linkage.
- **Conclusion:** This statement is **incorrect**.

### Final Answer:
The incorrect statement is **Option 4: Sucrose and amylose have 1,2-glycosidic linkage.**

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