Which of the following solutions contains same molar concentration?

$\left[\begin{array}{l}\mathrm{Mw}\text{ of }\mathrm{KI},{\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4,{\mathrm{CuSO}}_4\cdot 5{\mathrm{H}}_2\mathrm{O}\text{ and }\\ {\mathrm{Al}}^{3+},\text{ respectively, are, }166,132,250,\text{ and }\\ 27\mathrm{g} {\mathrm{mol}}^{-1}.\end{array}\right]$

$\begin{array}{l}1. \mathrm{M}=\frac{166\times 1000}{166\times 1000}=1.0\mathrm{M}\\ 2. \mathrm{M}=\frac{33\times 1000}{132\times 200}=1.25\mathrm{M}\\ 3. \mathrm{M}=\frac{25\times 1000}{250\times 100}=1.0\mathrm{M}\\ 4. \mathrm{M}=\frac{27\times {10}^{-3}\times 1000}{27\times 1}=1.0\mathrm{M}\end{array}$