A Particular Flower Can Be Purple, Blue, Red, or White

Multiple Choice

A particular flower can be purple, blue, red, or white.A pure-breeding purple plant is crossed with a pure-breeding white plant and the F₁ are then crossed to produce an F₂ generation.Which phenotypic ratio in the F₂ may indicate that flower color in these plants is controlled by two genes that interact additively?

A) 3:1
B) 1:2:1
C) 9:3:3:1
D) 9:3:4
E) 15:1