Custom of having many wives

A. Polyandry

B. Polygamy

C. Matrimony

D. Celibacy

Answer: Option B

Solution(By Examveda Team)

One word substitute is Polygamy.

Polyandry: polygamy in which a woman has more than one husband.
Polygamy: the practice or custom of having more than one wife or husband at the same time.
Matrimony: the state of being married; marriage.
Celibacy: the state of abstaining from marriage and sexual relations.