question: primary school students:college students
choices.label: A B C D
choices.text: metal:non-metal odd:integer teenager:middle age party member:teacher
explanation: "primary school students" and "college students" are both students, and "primary school students" and "college students" are one category, but in addition to "primary school students" and "college students", there are also junior high school students. "metal" and "non-metal" conflict. an "odd" is a type of "integer". both "juvenile" and "middle age" refer to age stages, and "juvenile" and "middle age" are one category, but in addition to "juvenile" and "middle age", there is also old age. "party member" can be a "teacher" and a "teacher" can be a "party member".
relation: primary school students college students R2.6
relation: metal non-metal R2.5
relation: odd integer R2.2
relation: teenager middle age R2.6
relation: party member teacher R2.7