Concept:A line of symmetry is an imaginary line that divides a figure into two identical mirror-image halves.Explanation:An isosceles triangle has one line of symmetry along its vertical axis.A kite has one line of symmetry along one of its diagonals.A rhombus has two lines of symmetry along its diagonals.A general trapezium has no line of symmetry unless it is an isosceles trapezium.Since the option simply mentions “Trapezium” without specifying “isosceles”, it is the correct choice.Answer:C. Trapezium