A copper rod of 88 cm and an aluminum rod of unknown length have their increase in length independent of increase in temperature. The length of aluminum rod is : ($\propto Cu=1.7\times10^{-5}K^{-1}and \propto Al=2.2\times 10^{-5}K^{-1}$)

Question

( A ) 68 cm
( B ) 113.9 cm
( C ) 6.8 cm
( D ) 88 cm