Sodium chloride (\( \text{NaCl} \)) readily dissolves in water, facilitated by robust ion-dipole interactions with water molecules. Conversely, \( \text{CaSO}_4 \), \( \text{BaSO}_4 \), and \( \text{AgCl} \) exhibit significantly reduced water solubility, with \( \text{BaSO}_4 \) and \( \text{AgCl} \) being practically insoluble.Consequently, \( \text{NaCl} \) demonstrates the highest solubility in water, aligning with option (1).