Which of the option figures completes the given pattern?

Answer & explanation
Correct answer: option 1
The correct answer is Option (1) →
The figure looks the same after a half turn about its centre: each quarter is the opposite quarter turned through 180°. So the missing top-right quarter is the bottom-left quarter turned through 180°.

Why the other options are incorrect
Option (2) — Incorrect. This copies the bottom-left quarter as it is; the gap needs that quarter turned through 180°.
Option (3) — Incorrect. This is the correct piece turned through 90° clockwise.
Option (4) — Incorrect. One line of the correct piece is missing.