Axis Bank may be the highest bidder for Citibank's India retail business, CNBC TV 18 reported on Monday citing sources. Axis Bank is also reportedly likely to strike an all-cash deal with Citibank, which could be worth $1.5 billion, the news channel said. Reportedly, Kotak Mahindra Bank and Induslnd Bank are also in the race to buy Citibank's assets.