$\begin{array}{1 1}(a)\;\text{One mole of solute present in 1 liter of the solution}\\(b)\;\text{One mole of the solute present in 1000 gm of the solvent}\\(c)\;\text{One gram equivalent of solute present in 1000 ml of solution}\\(d)\;\text{One gram equivalent of solute present in 1000 gm of the solvent}\end{array}$