Heat of combustion $\Delta H$ for $C(s), H_2(g)$ and $CH_4(g)$ are -94, -68 and -213 kcal/mol. Then $\Delta H$ for $C(s) + H_2(g) \rightarrow CH_4(g)$ is

Question

(a) -17 kcal
(b) -111 kcal
(c) -170 kcal
(d) -85 kcal