A student measured the dimeter of a s...

A student measured the dimeter of a small steel ball using a screw gauge of least count 0.001 cm . The main scale reading is 5 m m and zero of circult scale division coincides with 25 divisions above the reference level . If screw gauge has a zero error of - 0.004 cm , the correct diameter of the ball is

`0.053 cm `

`0.525 cm `

`0.521 cm `

`0.529 cm`

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