Choose the figure which is different from the other three.

The correct answer is Option (4) → 

Count the dots. Three figures have four dots each, whatever their shape. Option (4) has three dots, so it is the odd one out.

Option (1) — Incorrect. A square with four dots inside: four dots, like two other figures.

Option (2) — Incorrect. A triangle with four dots inside: four dots, like two other figures.

Option (3) — Incorrect. A hexagon with four dots inside: four dots, like two other figures.