Let $\text{A, B}$ be two disjoint non-empty sets. Let $\text{M}$ be the universal set and $\text{A} \cup \text{B}$ is a proper subset of $\mathrm{M}$. For any set $\mathrm{S}$, let $\mathrm{S}^{\prime}$ be the set of those elements which are in $\mathrm{M}$, but not in $\mathrm{S}$.
Which of the following sets forms a partition of $\text{M}$?
- $\{\mathrm{A}, \mathrm{B}\}$
- $\left\{\mathrm{A}, \mathrm{B}_{,} \mathrm{A}^{\prime} \cap \mathrm{B}^{\prime}\right\}$
- $\left\{\mathrm{A} \cup \mathrm{B}, \mathrm{A}^{\prime} \cap \mathrm{B}^{\prime}\right\}$
- $\left\{\mathrm{A} \cap \mathrm{B}, \mathrm{A}-\mathrm{B}, \mathrm{B}-\mathrm{A}, \mathrm{A}^{\prime} \cap \mathrm{B}^{\prime}\right\}$
