The shading moves in the sequence as shown in the figure:
The similar upper element appears in every fourth step. The lower element is replaced by a new element in every second step.
2. Select a figure from amongst the Answer Figures which will continue the same series as established by the five Problem Figures.
In each step, all the existing arcs get laterally inverted and a new arc is added which is oriented in a direction opposite to that of the last added arc. The arcs are added at various positions in the following sequences :
6. Select a figure from amongst the Answer Figures which will continue the same series as established by the five Problem Figures.