Official explanation
The vertical line remains unchanged in every cell. Only the black dots and hollow squares follow a pattern.
In each row, the third cell is created by combining the first two cells using these rules:
* If a black dot appears in the same position in both cells, it cancels out and disappears.
* If a hollow square appears in the same position in both cells, it transforms into a black dot.
* Any dot or square that appears in only one of the first two cells is carried into the third cell unchanged.
Applying these rules to the last row:
* The top-left dot appears in both cells, so it disappears.
* The bottom-left dot appears only once, so it remains.
* The bottom-right square appears in both cells, so it becomes a black dot.
* The top-right square appears only once, so it remains.
This produces a figure with two hollow squares at the top and two black dots at the bottom, which matches Option E.
Correct Answer
E
