Which of the solutes would make the solution with the highest concentration measured in molarity?

D) LiOH is correct.Molarity is number of moles of solute per liter of solution.The molecular weight of LiOH is small (7+16+1 = 24) when same weight of solutes are taken LiOH will have more numer of moles compared to others hence LiOH has high molar concentration.