Answer
B. symmetry with respect to the y-axis
Work Step by Step
Whenever $(r, \theta)$ is on the graph, so is $(r, \pi -\theta)$.
$x = r~cos~\theta = -r~cos(\pi-\theta)$
$y = r~sin~\theta = r~sin(\pi-\theta)$
Therefore, whenever $(x,y)$ is on the graph, so is $(-x,y)$.
Then the graph will have symmetry with respect to the y-axis.
