$\left.\begin{array}{c}2 x+3 y=4 \\x-y=7\end{array}\right\}$ সমীকরণ জোটে- $\text { i. } \mathrm{D}=-5$ $\text { ii. } \mathrm{D}_{\mathrm{x}} \neq \mathrm{D}_{\mathrm{y}}$ $\text { iii. }(x, y)=(5,-2)$ নিচের কোনটি সঠিক?

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