Choose the piece from the options that completes the figure below.

Answer & explanation
Correct answer: option 3
The correct answer is Option (3) →
The figure is symmetric about both the vertical and the horizontal lines through its centre: each quarter is the mirror image of the quarter beside it. So the missing top-right quarter is the mirror image of the top-left quarter across the vertical line.

Why the other options are incorrect
Option (1) — Incorrect. This copies the top-left quarter as it is; the gap needs its mirror image across the vertical line.
Option (2) — Incorrect. This is the correct piece turned through 90° anticlockwise.
Option (4) — Incorrect. One line of the correct piece is missing.