The document discusses and compares core business versus diversified business. It provides examples of companies with core businesses like Maruti, Infosys, and ArcelorMittal that focus on one main activity. Diversified companies pursue multiple business lines, allowing risk spreading but adding complexity. Large Indian conglomerates like DLF, Tata, Reliance, and UB Group operate across various industries through diversification. While the US trends toward core business, India's developing economy encourages large diversified business groups.