Molar mass of a diacidic base is 10g. Density of its aqueous solution is 1 g/ cc. More concentrated solution among the following is

(1) 1 M solution means      1 mole (10 g) of solute dissolved in 1000 ml solution      Wsolute=10 g; Vsolution=1000 ml Wsolution=V×d Wsolution=1000 g  Wsolvent=(1000-10)g=990 g(2) 1 molal solution means      1 mole (10) g solute in 1000 g solvent        Wsolute=10 g; Wsolvent=1000 g;(3) 1 N solution means       1 GEW (5 g) of solute in 1000 ml solution       Wsolute=5 g; Wsolvent=995 g;     (0r) Wsolute=10 g; Wsolvent=1990 g;(4) 0.1 % wv solution means        Wsolute=0.1 g ; Vsolution=100 ml ; Wsolution=100 g ; Wsolvent=99.9 g ;       0r Wsolute=10 g ; Wsolvent=9990 g ;Comparing all the solution1 M .   .   .   10 g of solute .   .   .   990 g of solvent1 m .   .   .   10 g of solute .   .   .   1000 g of solvent1 N .   .   .   10 g of solute .   .   .   1990 g of solvent0.1 %wv .   .   .   10 g of solute .   .   .   9990 g of solvent∴1 M is most concentrated.