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प्रश्न
Optical brighteners make garments appear ______.
विकल्प
Cleaner
Whiter
Crisper
Smoother
उत्तर
Optical brighteners make garments appear whiter.
Explanation:
Optical brightening agents are colourless dyes that bind to cloth and make it appear whiter by reflecting light.
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संबंधित प्रश्न
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