To address the question and ascertain the effects of the Green Revolution, let's examine each provided option:
- (A) Resulted in regional disparities: The Green Revolution disproportionately benefited areas with established resources and infrastructure, creating development gaps between regions.
- (B) Mechanization in agriculture displaced service caste groups: The adoption of machinery in farming led to the displacement of traditional service castes, diminishing their roles and economic stability.
- (C) Increased conflict between landed and landless laborers: While agricultural changes can contribute to social friction, this is not typically identified as a principal outcome of the Green Revolution.
- (D) Medium and large-scale farmers were the primary beneficiaries of new technology: The new agricultural technologies were often most accessible to medium and large farms, exacerbating income inequality.
Our analysis indicates that the accurate consequences are (A), (B), and (D). Consequently, the correct selection is (A), (B), and (D) only.