The current voltage graph for a given metallic wire at two different temperatures $T_1\: and \: T_2$ is shown in the figure. The temperature $T_1\: and \: T_2$ are related as :

Question

$\begin {array} {1 1} (1)\;T_1 > T_2 & \quad (2)\;T_1 < T_2 \\ (3)\;T_1 = T_2 & \quad (4)\;T_1 = 2T_2 \end {array}$