Choose the set of figures which follows the given rule.

Rule: Closed figures become more and more open and open figures become more and more closed.

Choose the set of figures which follows the given rule.

Rule: The series becomes simpler as it proceeds.

Choose the set of figures which follows the given rule.

Rule: As the circle decreases in size, its sectors increase in number.

Choose the set of figures which follows the given rule.

Rule: The series becomes complex as it proceeds.

Choose the set of figures which follows the given rule.

Rule: Closed figures become more and more open and open figures become more and more closed.