If You Stare for 30 Seconds at a Red Object

Multiple Choice

If you stare for 30 seconds at a red object and then look at a blank sheet of white paper,you will see a greenish image of the object.This phenomenon best supports the __________ theory of colour vision.

A) Grieco trichromatic
B) opponent process
C) Helmholtz trichromatic
D) Hering's vibration