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The smallest division on the main scale of a vernier callipers is `1mm`, and 10 vernier divisions coincide with 9 mainn scalel divisions. While measuring the diameter of a spehre the zero mark of the vernier scale lies between 2.0 and 2.1 cm and the fifth division of hte vernier main scale coincide with a main scale division. Then diameter of the sphere is

A

`2.05 cm`

B

`3.05 cm`

C

`2.50 cm`

D

None of these

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The correct Answer is:
A
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