question: oil paint:canvas
choices.label: A B C D
choices.text: ink:rice paper chalk:blackboard pencil:white paper paint:walls
explanation: the "oil color" is painted on the "canvas" and can penetrate into the "canvas" after painting. "ink" is used for painting and calligraphy on "rice paper" and can penetrate into "canvas" after painting. "chalk" is written on the "blackboard", but it cannot penetrate into the "blackboard". the "pencil" is written on the "white paper", but it cannot penetrate into the "white paper". the "paint" shall be painted on the "wall", but shall not penetrate into the "wall" after painting.
relation: oil paint canvas R3.5
relation: ink rice paper R3.5