Four identical rods are stretched by same force. Maximum extension is produced in
  • A$L = 10cm,\,\,D = 1\,mm$
  • B$L = 100\,cm,\,D = \,2mm$
  • C$L = 200\,cm,\,D = \,3mm$
  • D$L = 300\,cm,\,D = \,4\,mm$
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