Identifying the other symmetrical half of the given image.
As you can see in the given picture, the given shape has royal blue in the upper part and yellow in the bottom part. It has a half green circle at the top and pink at the bottom.
So, the symmetrical half will also have the same arrangement of the color and shape. The only difference will be the other half will be the mirror image of the given shape.
So the correct option is C.