Deals of the day-Mergers and acquisitions
(Adds Citigroup, Yahoo, DuPont, Zurich Insurance)
Feb 19 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1430 GMT on Friday:
** Dell Inc, the world's third-biggest maker of computers, is set to gain unconditional EU antitrust approval for its $67 billion bid for data storage company EMC Corp , two people familiar with the matter said on Thursday.
** Japan's Nippon Steel & Sumitomo Metal Corp is open to buying the Techint Group's stake in Brazilian flat steel maker Usiminas, a source with direct knowledge of the subject said on Thursday.
** Citigroup Inc said it plans to exit its retail banking and credit card operations in Brazil, Argentina and Colombia as part of efforts to aggressively cut costs and boost profitability.