Which of the following Boolean Expressions correctly represents the relation between $\text{P, Q, R}$ and $\mathrm{M}_{1}$ ?

- $\text{M}_{1} = \text{(P OR Q) XOR R}$
- $\text{M}_{1} = \text{(P AND Q) XOR R}$
- $\text{M}_{1} = \text{(P NOR Q) XOR R}$
- $\text{M}_{1} = \text{(P XOR Q) XOR R}$