Correct option is B. $$-4$$ to $$+ 4$$
$$\overset {-4} CH_4 (g) + 4Cl_2 (g)\longrightarrow \overset {+4} CCl_4 (l) + 4HCl(g)$$
The oxidation state of $$H$$ and $$Cl$$ are +1 and -1 respectively. Therefore the oxidation state of C in methane is $$-4$$ and that in carbon tetrachloride is $$+4$$.