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

Answer & explanation
Correct answer: option 4
The correct answer is Option (4) →
The figure looks the same after a quarter turn about its centre: going clockwise, each quarter is the one before it turned through 90° clockwise. So the missing top-left quarter is the bottom-left quarter turned through 90° clockwise.

Why the other options are incorrect
Option (1) — Incorrect. This copies the bottom-left quarter as it is; the gap needs that quarter turned through 90° clockwise.
Option (2) — Incorrect. This is the correct piece turned through 180°.
Option (3) — Incorrect. The black triangle of the correct piece is missing.