With the help of the following equations and data choose the wrong statement.
$\mathrm{I}. {\mathrm{CH}}_3\frac{⋮}{⋮}\mathrm{H}⟶\stackrel{\bullet }{\mathrm{C}}{\mathrm{H}}_3+{\mathrm{H}}^{\circ }$
${\mathrm{E}}_{\mathrm{act}}=+435.1\mathrm{kJ}$
$\begin{array}{l}\mathrm{II}. {\mathrm{CH}}_3-{\mathrm{CH}}_2\frac{⋮}{⋮}\mathrm{H}⟶{\mathrm{CH}}_3\dot{\mathrm{C}}{\mathrm{H}}_2+\mathrm{H}\bullet \\ {\mathrm{E}}_{\mathrm{act}}=+410.0\mathrm{kJ}\end{array}$
$\begin{array}{l}\mathrm{III}. {\mathrm{CH}}_3\frac{⋮}{⋮}{\mathrm{CH}}_3⟶2\stackrel{\bullet }{\mathrm{C}}{\mathrm{H}}_3\\ {\mathrm{E}}_{\mathrm{act}}=+368.0\mathrm{kJ}\end{array}$
$$\begin{gathered} \mathrm{IV}. {\mathrm{CH}}_3{\mathrm{CH}}_2\frac{⋮}{⋮}{\mathrm{CH}}_2{\mathrm{CH}}_3⟶2{\mathrm{CH}}_3\stackrel{\bullet }{\mathrm{C}}{\mathrm{H}}_2 \\ {\mathrm{E}}_{\mathrm{act}}=+368.0\mathrm{kJ} \end{gathered}$$
$\begin{array}{l}\mathrm{V}. {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\frac{⋮}{⋮}{\mathrm{CH}}_3⟶{\mathrm{CH}}_3{\mathrm{CH}}_2\stackrel{\bullet }{\mathrm{C}}{\mathrm{H}}_2+{\stackrel{\bullet }{\mathrm{CH}}}_3\\ {\mathrm{E}}_{\mathrm{act}}=355.6\mathrm{kJ}\end{array}$

During homolysis of ethane at high temperature, the (C-C) bond breaks more radily than (C-H) bonds.

Formation of ${\mathrm{CH}}_3{\dot{\mathrm{CH}}}_2$, radical by reaction (II) will take
place at lower temperature than the formation of ${\stackrel{\bullet }{\mathrm{C}}}_2{\mathrm{H}}_5$ radical by reaction (IV).

Thermal cracking of (C-H) bond of methane occurs at 1500 K and that of (C-H) bond of ethane breaks at 800-900 K.

During the cracking of n-butane, reaction (IV) occurs more readily than reaction (V).