Which is correct?

In a dot-pattern series question, treat the figure as two or more independent objects, each moving under its own fixed rule (shift, flip, rotate, or wrap around the grid edge) once per step. Track each object separately across the given frames, find its individual rule, then apply that rule once more to the missing frame — never blend the objects into a single combined movement.

• Object 1 (a 2-dot diagonal pair, confined to the leftmost two columns of the two upper rows): frame 1 shows the pair sloping down-right; frame 2 shows it flipped to slope down-left; frame 3 shows it back to sloping down-right. The orientation simply alternates every step.

• Object 2 (a rigid 3-dot horizontal bar, in the bottom row used): frame 1 has the bar occupying the grid's rightmost column plus its two leftmost columns (having wrapped past the right edge); frame 2 has the bar sitting flush against the three leftmost columns; frame 3 has the bar one column further right. So the bar shifts exactly one column to the right each step, re-entering from the left edge whenever it runs past the right edge.

Both rules hold for all three given frames without exception, so extending them once more is safe: the alternating diagonal must flip again to the down-left orientation, and the bar must shift one further column to the right from its frame-3 position.

Only the option whose figure shows the diagonal pair flipped to the down-left orientation together with the 3-dot bar advanced one more column to the right (wrapping style) satisfies both independent rules; that is the correct choice here.