Adani Group on Friday raised Rs 4,850 crore from the sale of 13.5 per cent of its stake in Fortune oil maker Adani Wilmar as part of a strategy to exit non-core activities to focus on main infrastructure business.The conglomerate, which last month announced its exit from Adani Wilmar by selling the bulk of its stake to a joint venture partner, had on Thursday announced sale of 17.54 crore shares (13.50 per cent equity) in the company on January 10 (to non-retail investors) and on January 13 (to retail investors) at a floor or minimum price of Rs 275 apiece.