For an ideal solution, the correct option is
ΔmixG=0 at constant T and P
ΔmixS=0 at constant T and P
ΔmixV≠0 at constant T and P
ΔmixH=0 at constant T and P
ΔmixG<0 at constant T and P, ΔmixS>0 at constant T and P , ΔmixV=0 at constant T and P are the conditions for an ideal solution.