Choose the set of figures which follows the given rule.

Rule: Any figure can be traced by a single unbroken line without retracting.

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

Rule: The series becomes complex as it proceeds.

Rule: Closed figures losing their sides and open figures gaining their sides.

From the given answer figures, select the one in which the question figure is hidden/embedded.

In the given figure, triangle represents the healthy, square represents the old, and circle represents the men. Find out the area of the figure whichrepresents the "men who are healthy but not old".