Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Let us consider the sets [Error converting from MathML to accessible text.] Choose the true statement (there may be more than one) : [Error converting from MathML to accessible text.]; The adherence of Racional-Natural is an open and closed set; [Error converting from MathML to accessible text.] does not belong to neither Y nor its boundary [Error converting from MathML to accessible text.]; The boundary of X has not a countable dense subset; [Z subset of Y with bar on top]; [Error converting from MathML to accessible text.] is empty
Right answer summary: [Error converting from MathML to accessible text.]; The adherence of Racional-Natural is an open and closed set; [Z subset of Y with bar on top]; [Error converting from MathML to accessible text.] is empty
Question state: todo