The functional group that is present in paper, cotton and sugar is:

Options

A. RX group
B. `-OH` group
C. `-COOR` group
D. `-NH_2` group

Explanation

To determine the functional group present in paper, cotton, and sugar, we need to analyze the chemical composition of each of these substances.

### Step 1: Identify the Composition of Each Substance
- **Paper**: Paper is primarily made from cellulose, which is a polysaccharide.
- **Cotton**: Cotton is also primarily composed of cellulose.
- **Sugar**: Common table sugar (sucrose) is a disaccharide made up of glucose and fructose.

### Step 2: Identify the Functional Group in Cellulose
Cellulose, which is present in both paper and cotton, is composed of repeating units of glucose. The functional group present in glucose is the hydroxyl group (-OH).

### Step 3: Identify the Functional Group in Sugar
Sugar (sucrose) also contains hydroxyl groups (-OH) as part of its structure.

### Conclusion
The functional group that is common in paper, cotton, and sugar is the **hydroxyl group (-OH)**.

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