Choose the figure which is different from the other three.

The correct answer is Option (4) → 

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

Option (1) — Incorrect. A triangle divided into three parts, one of them shaded.

Option (2) — Incorrect. A pentagon divided into five parts, one of them shaded.

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