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B
Braille paper is about as thick as a file folder or index card.
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C
Any kind of paper can be used.
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D
A 75 GSM thick paper is used.
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Solution
The correct option is D Braille paper is about as thick as a file folder or index card.
Braille was named after the creator, Louis Braille, a Frenchman who lost his sight as a result of childhood accident. It involves the usage of 6 dots and the direction is left to right. The paper used is think as a file folder or index card for proper sensing by the visually impaired people. The characters have rectangular blocks called cells that have tiny bumps called raised dots.
So, the correct answer is 'Braille paper is about as thick as a file folder or index card'.