Answer- D
Indian Overseas Bank (IOB) is an Indian public sector bank based in Chennai. It has about 3,220 domestic branches, 2 DBUs ( Digital Banking Unit) about 4 foreign branches and representative office.
Founded in February 1937 by M. Ct. M. Chidambaram Chettyar with twin objectives of specialising in foreign exchange business and overseas banking, it has created various milestones in Indian Banking Sector.
Hence, option 'D' is correct.