The Mother of These Progeny Resulted from a Cross Between

Multiple Choice

The mother of these progeny resulted from a cross between two flies from true breeding lines.What are the genotypes of these two lines?

A) pr pr cn⁺ cn⁺ and pr⁺ pr⁺ cn cn
B) pr⁺ pr⁺ cn⁺ cn⁺ and pr pr cn cn
C) pr⁺ pr cn⁺ cn and pr pr cn cn
D) pr⁺ pr cn cn and pr pr cn⁺ cn
E) Either pr pr cn⁺ cn⁺ and pr⁺ pr⁺ cn cn or pr⁺ pr⁺ cn⁺ cn⁺ and pr pr cn cn could be true.