Which of the following figures will come in the missing place in the below figure?
Series: [5-pointed Star] $\to$ [Octagon] $\to$ [Hexagon] $\to$ [?] $\to$ [Semicircle]

The sequence follows a pattern where the total number of sides (edges/line segments) decreases by 2 in each successive step:
* 1st figure (5-pointed Star): 10 sides
* 2nd figure (Octagon): 8 sides
* 3rd figure (Hexagon): 6 sides
* 4th figure (?): Should have $6-2=4$ sides (a quadrilateral)
* 5th figure (Semicircle): 2 sides (1 straight baseline + 1 curved arc)

Among the choices, option C is a 4-sided figure (quadrilateral). Thus, option C is the correct answer.