In Drosophila, XXY represents a female but in human it is an abnormal male. It shows that

The correct option is A Y-chromosome is essential for male sex in human.
In Drosophila, XXY represents a female but in human it is an abnormal male, because Y chromosomes are essential for determining the sex of the individual. Normally male individual possess X and Y chromosomes and female have XX chromosomes. Therefore individual having XXY genotype is an abnormal male.