Which one of the following polymers is used for making bullet-proof windows?

The correct answer is (a) Polycarbonates.

Polycarbonates are a type of thermoplastic polymer that is known for its strength, toughness, and transparency. They are often used in applications where high impact resistance is required, such as in bullet-proof windows.

Polyurethanes are a type of elastomer that is known for its flexibility and resilience. They are often used in applications where cushioning or vibration damping is required, such as in car seats or mattresses.

Polystyrene is a type of thermoplastic polymer that is known for its low cost and ease of processing.

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