Dikus of Bihar are-

Migrant traders and money lenders

The correct answer is Option (1) → Migrant traders and money lenders

Within south Bihar, adivasis shared a common hatred of dikus – migrant traders and money-lenders who had settled in the area and grabbed its wealth, impoverishing the original residents. Most of the benefits from the mining and industrial projects in this mineral-rich region had gone to dikus even as adivasi lands had been alienated.