`DeltaH_(f)^(@)` (298 K) of methanol is given by the chemical equation
A. `CH_(4)(g)+1//2O_(2)(g)rarrCH_(3)OH(g)`
B. `C("graphite")+1//2O_(2)(g)+2H_(2)(g)rarrCH_(3)OH(l)`
C. `C("diamond")+1//2O_(2)(g)+2H_(2)(g)rarrCH_(3)OH(l)`
D. `CO(g)+2H_(2)(g)rarrCH_(3)OH(l)`
