Which colour is formed by mixing yellow and red?

Correct answer: Orange

The governing concept is traditional subtractive colour mixing used in painting. Yellow and red are primary colours, and their mixture produces the secondary colour orange, so option B is correct. Green results from yellow mixed with blue, while violet or purple results from red mixed with blue. Blue alone is not produced by combining yellow and red. The exact shade of orange depends on the proportions and strength of the two paints.