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The following four wires are made of the...

The following four wires are made of the same material. If same tension is applied to each, the wire having largest extension is

A

l = 50cm and diameter 0.5mm

B

l = 100cm and diameter 1.0mm

C

l = 200cm and diameter 2.0mm

D

l = 300cm and diameter 3.0mm

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