It is not possible to construct a triangle with sides

Question

$\begin{array}{1 1} (a)\; 8.3\; cm, 3.4 \;cm, 6.1\; cm \\ (b)\; 5.4 \;cm, 2.3\; cm, 3.1 \;cm \\ (c)\; 6 \;cm, 7 \;cm, 10 \;cm \\ (d)\; 3 \;cm, 5 \;cm, 5 \;cm \end{array}$