Boolean expression for the output of $\text{XNOR}$ (Equivalent) logic gate with inputs $A$ and $B$ is
- $\mathrm{A} \overline{\mathrm{B}}+\overline{\mathrm{A}} \mathrm{B}$
- $\overline{\mathrm{AB}}+\mathrm{AB}$
- $(\overline{\mathrm{A}}+\mathrm{B})(\mathrm{A}+\overline{\mathrm{B}})$
- $(\overline{\mathrm{A}}+\overline{\mathrm{B}})(\mathrm{A}+\mathrm{B})$