Correct option is C
Bulletproof glass is a type of strong and optically transparent material that is designed to resist penetration from bullets. It is made by layering a combination of two or more types of glass. Typically, bulletproof glass consists of a hard, thick glass sheet combined with a layer of vinyl plastic.
The plastic layer, usually made from polyvinyl butyral (PVB) or similar materials, plays a crucial role in absorbing the energy from the impact of a bullet. When a bullet strikes the glass, the outer layers may crack, but the plastic layer prevents the bullet from fully penetrating by distributing the force and holding the structure together.
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Steel (option a) and
Stainless steel (option b) are metals that would not be appropriate for the flexibility required in bulletproof glass, though they are used in other protective structures.
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Chromium plate (option d) is also unsuitable as it is typically used for coating or plating materials to prevent corrosion, but not for absorbing high-energy impacts.
