Which one of the following has the same value as `Delta_(f)H^(Theta), CO`?

Options

A. `(1)/(2)Delta_(f)H^(Theta)(CO_(2))`
B. `(1)/(2)Delta_(c)H^(Theta)("graphite")`
C. `Delta_(f)H^(Theta) (CO_(2)) -Delta_(f)H^(Theta) ("graphite)"`
D. `Delta_(c)H^(Theta) ("graphite") - Delta_(c)H^(Theta) (CO)`

Explanation

`{:(C(g)+(1)/(2)O_(2)(g) rarr CO(g),,Delta_(f)HCO(g) =x),(i.C(g)+O_(2)(g)rarrCO_(2)(g),,DeltaH_(c)C(g)=y),(ii.CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g),,DeltaH_(c)CO(g)=z):}`
Substracting equation (ii) from (i), we get
`{:(C(g)+(1)/(2)O_(2)(g)rarrCO(g),,DeltaH=y-z):}`