Each division on the main scale is \( 1 \mathrm{~mm} \). Which of the following vernier scales g...

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Each division on the main scale is \( 1 \mathrm{~mm} \). Which of the following vernier scales give vernier constant equal to \( 0.01 \mathrm{~mm} \) ?
(a) \( 9 \mathrm{~mm} \) divided into 10 divisions
(b) \( 90 \mathrm{~mm} \) divided into 100 divisions
(c) \( 99 \mathrm{~mm} \) divided into 100 divisions
(d) \( 9 \mathrm{~mm} \) divided into 100 divisions
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