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B
21st January
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C
14th January
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D
4th March
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Solution
The correct option is A 4th January
World Braille Day is annually celebrated on January 4, the birthday of Braille inventor, Louis Braille.
The day recognizes the contributions of Louis Braille in helping blind and visually impaired people to read and write. Hence, World Braille Day is observed on 4th January.