Which option shows an incorrect relationship between primary colours and the secondary colour they produce?

Correct answer: Red and green make yellow

In the traditional RYB pigment system, the standard secondary colours are produced by pairing two primaries: red plus yellow gives orange, yellow plus blue gives green, and blue plus red gives violet. Thus A, B, and C are correct relationships. Option D is incorrect because green is already a secondary colour, not one of the three traditional primary colours used in these pairings.