Which substance is used for metalling the roads these days in place of coal tar ?

Options

A. Petrol
B. Bitumen
C. Paraffin Wax
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a substance that is currently used for metalling roads instead of coal tar.

2. **Identifying the Traditional Material**: Coal tar has traditionally been used for road metalling due to its properties.

3. **Researching Current Alternatives**: To answer the question, we need to identify what is being used in place of coal tar today.

4. **Identifying the Current Material**: The current material used for metalling roads instead of coal tar is bitumen.

5. **Defining Bitumen**: Bitumen, also known as asphalt, is a sticky, black, highly viscous liquid or semi-solid form of petroleum.

6. **Conclusion**: Therefore, the substance used for metalling roads these days in place of coal tar is bitumen (or asphalt).

**Final Answer**: Bitumen (or asphalt) is used for metalling roads instead of coal tar.

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