The internal and external diameters of a hollow cylinder are measured with the help of a Vernier callipers . Their values are `4

The internal and external diameters of a hollow cylinder are measured with the help of a Vernier callipers . Their values are `4.23 +- 0.01 cm and 3.87 +- 0.01 cm`, respectively . The thickness of the wall of the cylinder is
A. `(0.34 pm 0.02)cm`
B. `(0.17 pm 0.12)cm`
C. `(0.17 pm 0.01)cm`
D. `(0.34 pm 0.01)cm`

The internal and external diameters of a hollow cylinder are measured with the help of a Vernier callipers . Their values are `4.23 +- 0.01 cm and 3.8

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