Among the chlorides of alkali metals, what is the decreasing order of hydration?

1.
Among the chlorides of alkali metals, what is the decreasing order of hydration?

1. NaCl > KCl > RbCl > LiCl > CsCl2. LiCl > CaCl > KCl > RbCl > NaCl3. LiCl > NaCl > KCl > RbCl > CsCl4. All are equally hydrated as halide is same