question: caries:oral cavity:disease
choices.label: A B C D
choices.text: vision:eyes:feeling bullet:pistol:weapon greenhouse effect:atmosphere:earth photosynthesis:chloroplast:plant
explanation: "caries" is a kind of "oral cavity""disease". "diseases" includes "dental caries", and "dental caries" corresponds to "oral cavity". "vision" belongs to the "sensation" of "eyes". "sensation" includes "vision", and "vision" corresponds to "eyes". "bullets" and "pistols" should be used together, and "pistol" is a kind of "weapon". the "greenhouse effect" occurs on the surface of the "earth". "plants" produce "photosynthesis".
relation: caries disease R2.2
relation: caries oral cavity R3.10
relation: vision R2.2
relation: vision eyes R3.10
relation: bullet pistol R3.10
relation: greenhouse effect earth R3.10
relation: photosynthesis plant R3.10