\[\begin{tabular}{|l|l|} \hline Assertion (A) & Reason $(\mathrm{R})$ \\ \hline The system of equations $\mathrm{x}+\mathrm{y}-8=0$ and $\mathrm{x}-\mathrm{y}-2=0$ has a unique solutions. & $\begin{array}{l}\text { The system of equations } \\ \mathrm{a}_{1} \mathrm{x}+\mathrm{b}_{1} \mathrm{y}+\mathrm{c}_{1}=0 \\ \text { and } \mathrm{a}_{2} \mathrm{x}+\mathrm{b}_{2} \mathrm{y}+\mathrm{c}_{2}-0 \\ \text { has a unique solution when } \\ & \frac{a_{1}}{a_{2}}=\frac{b_{1}}{b_{2}}\end{array}$ \\ \hline \end{tabular}\]


The correct answer is: (a) / (b)/ (c)/ (d).