Question figure

The correct option is the fourth option (Option 4).

Let's analyze the shapes provided in the question figure (Image 0):
1. Two Triangles: A larger triangle on the lower-left and a slightly smaller triangle on the upper-left.
2. Two Semicircles: One semicircle in the middle and another in the upper-right.
3. One Sector (Quadrant): A quarter-circle sector (90-degree slice) in the lower-right, featuring two straight perpendicular radii and a curved arc.

Now, let's examine how these five components are assembled in the correct figure (Option 4):
- The Right Portion: The two semicircles are joined along their straight diameters to form a single complete oval/circle.
- The Left Portion: The remaining three pieces are combined:
- The quadrant (quarter-circle) is located at the bottom-left with its curved arc facing downwards.
- The larger triangle is attached to the flat top edge of the quadrant.
- The smaller triangle is attached to the upper-left edge of the larger triangle.

Thus, all five original pieces from the question figure are used exactly once without any modifications or extra shapes, making Option 4 the correct combination.