choices.label: A B C D
choices.text: radio:announcer vending machine:salesperson learning machine:counsellor card reader:conductor
explanation: both "atm" and "bank clerk" can handle the cash withdrawal business, and the functions of the two are similar. a "radio" is a tool for listening to radio stations, and an "announcer" is a staff member who broadcasts information. the functions of the two are different. both "vending machine" and "salesperson" can sell goods, and they have similar functions. a "learning machine" is a tool assisting learning, while a "counsellor" does not have the function of assisting learning. there is no similarity in the functions of the two. the "card reader" is a tool for reading the information on cards, while the "conductor" has the function of selling tickets. the functions of the two are different.
relation: atm bank clerk R3.10
relation: vending machine salesperson R3.10