A brief information about three different plastics is given below:
X : Thermoplastic which can be rolled into sheets.
Y : Thermoplastic which is used as a covering for electric wires.
Z : Thermosetting which is used for making plugs and switches.
Identify X, Y and Z.

Options

A. `{:(X,Y,Z),("Melamine", "Teflon","Bakelite"):}`
B. `{:(X,Y,Z), ("Bakelite","Melamine","Polythene"):}`
C. `{:(X,Y,Z),("Polythene", "Polyvinyl chloride", "Bakelite"):}`
D. `{:(X,Y,Z),("Polyvinyl chloride", "Polythene","Melamine"):}`

Answer

To identify the three different plastics mentioned in the question, we will analyze each description step by step.

### Step 1: Identify Plastic X
- **Description**: Thermoplastic which can be rolled into sheets.
- **Analysis**: Thermoplastics are materials that can be softened by heating and can be reshaped. A common thermoplastic that can be rolled into sheets is **Polythene**.
- **Conclusion**: **X = Polythene**

### Step 2: Identify Plastic Y
- **Description**: Thermoplastic which is used as a covering for electric wires.
- **Analysis**: A widely used thermoplastic for insulating electric wires is **Polyvinyl Chloride (PVC)**. It is durable and provides good insulation.
- **Conclusion**: **Y = Polyvinyl Chloride (PVC)**

### Step 3: Identify Plastic Z
- **Description**: Thermosetting plastic which is used for making plugs and switches.
- **Analysis**: Thermosetting plastics cannot be remolded after they have set. A common thermosetting plastic used for making electrical fittings like plugs and switches is **Bakelite**.
- **Conclusion**: **Z = Bakelite**

### Final Summary
- **X = Polythene**
- **Y = Polyvinyl Chloride (PVC)**
- **Z = Bakelite**

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