Question

Am I Right???

Answer 1

i think 2 is incomplete

Answer 2

the line: (r,pi/2) is a vertical line thru the center ....

pi/2 is held constant and r varies along it ...

Answer 3

@amistre64 is right, so you are only partially correct:
yes there is symmetry about the pole (0,0), but the symmetry about the line is actually pi/2, so both A and B are correct, but NOT C.

Answer 4

@ohohaye