Equimolar solutions of the following substances were prepared separately. Which one of these, record the highest pH value.

Basic strength order of NaOH > Al(OH)3 ~ Be(OH)2 > Fe(OH)3Aqueous solution of NaCl is neutral [PH = 7] because it is a salt of strong acid and strong base the remaining 3 - aqueous solutions are acidic in nature as they salts of weak base acids [PH < 7]