$2x_1+5x_2=25y_1,$

where decision variables $x_1$ and $x_2$ are continuous, while the decision variable $y_1$ is a binary type $(0-1).$ The scenario bellow is true only if the variable $y_1$

$2x_1+5x_2=25,$

Please choose one of the following options that best fit the empty space above.

$0$ or $1$

not selected

selected

$2$

None of the above