question: product:commodity
choices.label: A B C D
choices.text: metal:wood worker:parliamentarian tool:hoe students:scholar
explanation: "commodity" is the "product" of labor for exchange, and "product" includes "commodity". there is no obvious logical relationship between "metal" and "wood". a "worker" can be a "parliamentarian", and a "parliamentarian" can also be a "worker". "hoe" is a kind of "tool", and "tool" includes "hoe". a "student" can be a "scholar" and a "scholar" can also be a "student".
relation: commodity product R2.2
relation: worker parliamentarian R2.7
relation: hoe tool R2.2
relation: students scholar R2.7