choices.label: A B C D
choices.text: guitarist:bassist oil painting:sketch heredity:variation neat:messy
explanation: "peace" is the opposite of "war" both "guitarist" and "bassist" belong to band roles, and "guitarist" is not the opposite of "bassist" "oil painting" and "sketch" belong to different painting methods, "oil painting" is not the opposite of "sketch" both "heredity" and "variation" are the basic characteristics of organisms and are two forms in the evolution of life. "heredity" is not the opposite of "variation" "neat" is the opposite of "messy"
relation: peace war R1.2
relation: guitarist bassist R2.4
relation: oil painting sketch R2.4
relation: heredity variation R2.4
relation: neat messy R1.2