`{:(,"Column-I",,"Column-II"),((a),C ("s,graphite")+0_(2)(g)rarrCO_(2)(g),(p),DeltaH^(@)_("Combustion")),((b),C("s,graphite")rarrC(g),(q),DeltaH^(@)_("combustion")),((c),CO(g)+(1)/(2)O_(2)(g)rarrCO_(2)(g),(r),DeltaH^(@)_("atomization")),((d),CH_(4)(g)rarrC(g)+4H(g),(s),DeltaH^(@)("sublimation")):}`

Answer

A-p,q ; B-q,r,s : C-p ; D-r

Explanation

(A)This is combustion reaction as well as formation reaction of `CO_2`
(B)This is sublimation, atomization as well as formation reaction of C(g)
( C)This is combustion reaction of CO(g)
(D)This is atomization of `CH_4(g)`