Which of the following is/are correct ?

Endogamy refers to marriage within a unit- this could be a kin group, caste, or a group living in the same locality Exogamy refers to marriage outside the unit. Polygyny is the practice of a man having several wives. All of these

All of these

Endogamy refers to marriage within a unit – this could be a kin group, caste, or a group living in the same locality. Exogamy refers to marriage outside the unit. Polygyny is the practice of a man having several wives. Polyandry is the practice of a woman having several husbands.