Blue RG None Black m. G Green n. See table above In the first column, if a secondary color of light is shown, it is translated into the equivalent primaries. These primaries will strike the paper and may or may not be absorbed. The subtraction process is then done to determine what primary color of light is reflected.
Red paper contains pigments capable of absorbing both green and blue light if present.
Only green light is present, so it is absorbed. The same process can be performed for all other parts of this question.