formation of a solution form two components can be considered as
(i) Pure solvent rarr separated solvent molecules, `DeltaH_(1)`
(ii) Pure solute rarr separated solute molecules, `DeltaH_(2)`
(iii) separated solvent and solute molecules rarr solution, `DeltaH_(3)`
Solution so formed will be ideal if
A. `DeltaH_"Soln"=DeltaH_1+DeltaH_2+DeltaH_3`
B. `DeltaH_"Soln"=DeltaH_1+DeltaH_2-DeltaH_3`
C. `DeltaH_"Soln"=DeltaH_1-DeltaH_2-DeltaH_3`
D. `DeltaH_"Soln"=DeltaH_3-DeltaH_1-DeltaH_2`