Which option completes the 3 × 3 figure matrix given below?

Answer & explanation
Correct answer: option 3
The correct answer is Option (3) →
In each row, the third figure is the first two figures put together: it has every line of the first figure and every line of the second. Doing the same with the first two figures of row 3 gives the missing figure.

Why the other options are incorrect
Option (1) — Incorrect. One line of the correct figure is missing.
Option (2) — Incorrect. It has an extra line that is in neither of the first two figures.
Option (4) — Incorrect. It is only the first figure of the row; the second figure has not been used.