The correct option of including Foreign Currency Convertible Bonds (FCCBs), Foreign Institutional Investment (FII) with certain conditions, and Global Depository Receipts (GDRs) in Foreign Direct Investment (FDI) is grounded in their characteristics of facilitating long-term investment and ownership in enterprises. FCCBs and GDRs allow foreign investors to acquire equity interest in domestic firms, thereby contributing to capital and technological inflow, which is a hallmark of FDI. Conversely, non-resident external deposits (NRE) typically involve portfolio investment rather than a direct influence or control over a business, aligning them more closely with Foreign Portfolio Investment (FPI) than with FDI, which is characterized by a commitment to managing assets. Thus, the first three instruments represent vehicles for foreign investment that can directly impact the management and operations of domestic companies.