If the base of a right angled triangle is 5 cm long and the height of the triangle is 7 cm longer than the base, what is the length of the third side of the triangle ?

Question

$\begin{array}{1 1} (a)\;15\;cm \\ (b)\;12\;cm \\ (c)\;13\;cm \\(d)\;10\;cm \end{array} $