question: b-ultrasound:ultrasound:diagnosis
choices.label: A B C D
choices.text: radar:antenna:detection camera:negative:photography refrigerator:refrigerant:refrigeration computer:display:work
explanation: "b-ultrasound" uses "ultrasound" for diagnosis. "radar" uses electromagnetic waves for "detection", rather than using an "antenna". "camera" uses the principle of optical imaging to "photograph", rather than using the "negative". the "refrigerator" uses "refrigerant" for "refrigeration". the "display" is an integral part of the "computer", which does not "work" by using a "display".
relation: b-ultrasound ultrasound diagnosis R3.10
relation: refrigerator refrigerant refrigeration R3.10
relation: computer display R2.3