Factors

Which statement is correct?

1. The variable gender is a factor with two factor levels: integer 1 corresponds to the factor level “male” and 2 corresponds to “female”.
2. The variable Gender is a factor with two factor levels: integer 1 corresponds to the factor level “male” and 2 corresponds to “female”.
3. The variable gender is a factor with two factor levels: integer 1 corresponds to the factor level “female” and 2 corresponds to “male”.
4. The variable Gender is a factor with two factor levels: integer 1 corresponds to the factor level “female” and 2 corresponds to “male”.