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Heat of combustion DeltaH^(@) for C(s),H...

Heat of combustion `DeltaH^(@)` for `C(s),H_(2)(g)` and `CH_(4)(g)` are `-94, -68` and `-213Kcal//mol` . Then `DeltaH^(@)` for `C(s)+2H_(2)(g)rarrCH_(4)(g)` is

A

`-17 kcal`

B

`-111 kcal`

C

`-170 kcal`

D

`-85 kcal`

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The correct Answer is:
A
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