From the given options,
Area of a rectangle of length 4 cm and breadth 3 cm = 4 × 3 = 12 cm2
Area of a rectangle of length 6 cm and breadth 2 cm = 6 × 2 = 12 cm2
Area of a square of 3 cm side. = 3 × 3 = 9 cm2
Area of a triangle with base 3 cm and height 8cm = 12 × 4 × 3 = 12 cm2