The Wancho tribe of Arunachal Pradesh is known for their tradition of:

The correct answer is: b) Powerful headhunting warriors.

The Wancho tribe is a Naga tribe of Arunachal Pradesh, India. They are known for their tradition of headhunting, which was practiced until the early 20th century. Headhunting was a way for the Wancho to show their bravery and strength, and it was also believed to bring good luck. The Wancho are now a peaceful people, but they still maintain their traditional culture and way of life.

The other options are incorrect for the following reasons:

• Option a) is incorrect because the Wancho are not an egalitarian society. They have a hierarchical social structure, with a chief at the top.
• Option c) is incorrect because the Wancho are not known for their elaborate weaving. They do weave cloth, but it is not as elaborate as the weaving of some other tribes in Arunachal Pradesh.
• Option d) is incorrect because the Wancho are not known for their maritime trade. They are a landlocked tribe, and they do not have a history of maritime trade.