Answer is C.According to Ohm's law, V = IR. That is, I = V/R.Now, if the resistance is halved and the voltage remains the same, the new value of current becomes, I'=\\dfrac { V }{ \\dfrac { R }{ 2 } } =\\dfrac { 2V }{ R } .\\quad That\\quad is,\\quad I'=2(\\dfrac { V }{ R } )=2I .Hence, the current will become double.