Select a suitable figure from the four alternatives that would complete the figure matrix.

Answer & explanation
Correct answer: option 4
The correct answer is Option (4) →
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In each row, the second figure is the first figure with one new line added, and the third figure shows only that new line, the part the first two figures do not share. In row 3 the new line is the V-shaped curve drawn across the lower part of the two squares, so it alone fills the missing cell.