Select the correct option that will come next in the following series

Key insight: the shaded cluster keeps the same internal arrangement and moves one triangular sector clockwise at each step.

• Identify the invariant: the internal pattern of small black triangles does not change from frame to frame.

• Determine the movement: the shaded cluster shifts one triangular sector clockwise in each successive figure.

• Apply the rule to get the next figure: move the unchanged cluster one sector clockwise from the last given figure.

• Check the answer images: choose the image that shows the cluster located in that next clockwise sector with the same internal arrangement.

Why the other images are incorrect:

• One image places the shaded cluster in a sector that would correspond to moving counterclockwise or to a mirrored position, so it does not follow the clockwise rule.

• Another image preserves the cluster shape but puts it in the wrong sector (not the immediate clockwise neighbor), so it cannot be the next figure.

• A remaining image appears to mirror or flip the pattern instead of rotating it clockwise, which breaks the established transformation.

Conclusion: choose the image that shows the unchanged shaded cluster moved one triangular sector clockwise from the previous figure. That image matches the required rotation and is the correct continuation of the series.