Which of the following pairs is a solution of $$\begin{cases}2x-4=0 \textbackslash\textbackslash{} 4x-y=7 \end{cases}$$? 
选项为:A:($x$,$y$)=($2$,$-1$)  B:($x$,$y$)=($2$,$1$)  C:($x$,$y$)=($-2$,$1$)  D:($x$,$y$)=($-2$,$-1$)  请回答其中一个选项.