The correct answer is: b) Gaonburas.
Gaonburas are hereditary chiefs in some tribal societies in Arunachal Pradesh. They are responsible for the administration of their villages and for settling disputes between their people. They are also the leaders of their people in times of war.
Zamindars were landlords in India who collected taxes from the peasants who lived on their land. Panchayat leaders are elected representatives of a village or group of villages in India. Elected representatives are people who are elected by the people to represent them in government.
Gaonburas are different from Zamindars, Panchayat leaders, and elected representatives in that they are hereditary chiefs. This means that they are the leaders of their people because of their birth, not because they were elected or appointed.