Which concept refers to genitals that distinguish females and males?

Question

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Primary sex characteristics refer to the reproductive organs that distinguish females and males, including the genitals. Gender (A) refers to the societal and cultural expectations and roles associated with being male or female. Secondary sex characteristics (C) refer to physical traits that develop during puberty and differ between males and females, such as body hair and breast development. Sexual chromosomes (D) are the pair of chromosomes that determine an individual's biological sex (XX for female and XY for male).

Which Concept Refers to Genitals That Distinguish Females and Males