The external and internal diameters of a...

The external and internal diameters of a hollow cylinder are determined with vernier callipers and the results are recorded as `4.23 pm0.01` cm and `3.89pm0.01` cm. The thickness of the cylinder wall within the limits of error is

`0.34 +- 0.01cm`

`0.34 +- 0.02cm`

`0.34 +- 0.04cm `

`0.17 +- 0.01cm `

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