Suppose gene A and gene B are responsible for the purple coloration of the pea's flower. Gene A converts the colorless substrate into another colorless product. The colorless product is further converted into a visible pigment by gene B which results in the flower's purple color. This type of gene relationship is considered as:

• A. complementary gene action
• B. redundant function
• C. dominant epistasis
• D. recessive epistasis

Answer: (A)