Can the Lines in the Figure Below Be Equipotential Lines

Multiple Choice

Can the lines in the figure below be equipotential lines?

A) No, because there are sharp corners.
B) No, because they are isolated lines.
C) Yes, because any lines within a charge distribution are equipotential lines.
D) Yes, they might be boundary lines of the two surfaces of a conductor.
E) It is not possible to say without further information.