Compound which is added to soap to impart antiseptic properties is `"………….."`

Options

A. sodium laurylsulphate
B. sodium dodecylbenzenesulphonate
C. rosin
D. bithional

Explanation

To solve the question "Compound which is added to soap to impart antiseptic properties is '…………..'", we will analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
The question asks for a compound that is specifically added to soap to give it antiseptic properties. This means we are looking for a chemical that can help in killing or inhibiting the growth of microorganisms.

2. **Reviewing the Options**:
The options provided are:
- 1. Sodium lauryl sulfate
- 2. Sodium dodecyl benzene sulfonate
- 3. Rosin
- 4. Bithionol

3. **Analyzing Each Option**:
- **Option 1: Sodium lauryl sulfate**: This is an anionic detergent commonly used for cleaning purposes. It does not have antiseptic properties.
- **Option 2: Sodium dodecyl benzene sulfonate**: This is also an anionic detergent and is primarily used for cleaning. It does not provide antiseptic properties.
- **Option 3: Rosin**: Rosin is a natural resin that is used in soap to enhance lathering. It does not have antiseptic properties.
- **Option 4: Bithionol**: This compound is known for its antiseptic properties and is specifically added to soaps to impart these properties.

4. **Identifying the Correct Answer**:
After analyzing all the options, it is clear that the compound that imparts antiseptic properties to soap is **Bithionol**.

5. **Final Answer**:
Therefore, the answer to the question is **Bithionol**.