choices.label: A B C D
choices.text: jack:100 feet hand-cranked bed:foot-pedalled bicycle heating furnace:cooling tank loading and unloading truck:recorder
explanation: both "red light" and "green light" belong to "traffic light", and "open cabinet" and "close cabinet" belong to "switch cabinet". there is no obvious logical relationship between "jack" and "100 feet". both "hand-cranked" and "bed" belong to the "hand-cranked bed", and "foot-pedaled" and "bicycle" belong to "foot-pedalled bicycle". but there is no antonym between the two words. both "heating furnaces" and "cooling tanks" are tools. both "loading" and "unloading" are actions, and "recorder" and "player" are machines.
relation: hand-cranked bed foot-pedalled bicycle R2.6
relation: heating furnace cooling tank R2.6