Which of the following figures is the odd one out?

The correct answer is Option (4) → 

Count the shaded parts. Three figures have two shaded parts each, though they are divided differently. Option (4) has three shaded parts, so it is the odd one out.

Option (1) — Incorrect. A circle divided into eight parts, two of them shaded.

Option (2) — Incorrect. A hexagon divided into six parts, two of them shaded.

Option (3) — Incorrect. A circle divided into six parts, two of them shaded.