Correct choice is (c) H2O
To elaborate: The principle of solubility states that ‘like dissolves like’. Following this, it is seen that 3-Aminopropan-1-ol is a highly polar compound since it bears an amine group as well as a hydroxyl group. The polarity of amine group is due to the highly electronegative nature of N atom in N – H and C – N bonds. Since water is the most polar solvent amongst the four, it will dissolve the solute to greatest extent.