WNS (Holdings) Limited (WNS) (NYSE: WNS), a leading provider of global Business Process Outsourcing (BPO) services, has been positioned by Gartner, Inc. in the ‘Leaders’ quadrant of the ‘2013 Magic Quadrant’ for Finance and Accounting BPO for the third consecutive year. Vendors were evaluated on two primary criteria – ‘ability to execute’ and ‘completeness of…