Two balls marked with question marks, right and left. The left ball has arrows emerging in all directions but to the right and all arrows either point to the left or immediately bend toward the left after emerging. The right ball has arrows emanating in all directions but to the left and all arrows either point to the right or immediately bend toward the right. Use the drop-down menu to complete the statement.

Based on the field lines, the electric charges indicated by the question marks are?

a) the same
b) the opposite