Explanation:
5cm, 6cm, 4cm
As in a triangle, the sum of any two sides should be strictly greater than the third side.
In (A), 5 + 6 > 4 \(\therefore\) This pair will form triangle.
In (B), 13 + 12 > 24 This pair will form triangle.
In (C), 2 + 7 > 9 This pair will not form triangle.
In (D), 5.6 + 6.5 > 12 This pair will form triangle.