Final answer:
The opponent-process theory posits that certain cells in the visual system are stimulated by one color and inhibited by its opponent. For the color pairing in question, cells turned "on" by yellow light are turned "off" by blue light, making the correct answer 'c) yellow; blue.'
Step-by-step explanation:
According to the opponent-process theory of color vision, cells in our visual system are excited by one color and inhibited by its opponent color. The correct matching of the opponent colors, as per this theory, is yellow and blue, and red and green. Therefore, cells that are turned "on" by yellow light are turned "off" by blue light, and cells that are turned "on" by green light are turned "off" by red light.
Given the options provided in the question:
- a) blue; green
- b) red; blue
- c) yellow; blue
- d) yellow; green
The correct answer is c) yellow; blue.