In which tribal system, does a chieftain play in important role in maintaining social order??

a) Acephalous

b) Cephalous

c) Bureucratic

d) Oligarchy

In  Oligarchy a chieftain play in important role in maintaining social order.

Oligarchy is a form of government where power effectively rests with a small elite segment of society distinguished by royalty, wealth, family, military influence or occult spiritual hegemony. The word oligarchy is from the Greek words for "few" and "rule".

b) Cephalous

because only this society has a chief.