The radius of a sphere is measured to be...

The radius of a sphere is measured to be `(2.1 +- 0.02) cm`. Calculate its surface area with error limits.

A

`54.45 +- 2.46`

B

`55.44 +- 2.64`

C

`52.03 +- 4.26`

D

`45.54 +- 2.68`

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The correct Answer is:

B

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