The temperature dependence of resistances of $Cu$ and undoped Si in the temperature range $300 - 400 K$ , is best described by :

Question

$\begin{array}{1 1} (1)\text{Linear increase for Cu, linear increase for Si.} \\ (2)\text{Liner increase for Cu, exponential increase for Si.} \\(3) \text{Linear increase for Cu, exponential decrease for Si.} \\ (4) \text{ Linear decrease for Cu, linear decrease for Si.} \end{array}$