Which of the following is that of the solution set represents the graph below ?

Question

$\begin{array}{1 1} (a)\; x < 3\;or\; x>7 \\ (b)\; x<3 \;and \; x>7\\(c)\;x>3 \; or\; x<7 \\(d)\; x>3\;and \;x<7 \end{array}$</span>