Four of the following five are alike in a certain way and thus form a group. Find the one which does not belong to that group?

Study the following information carefully and answer the questions given beside. Aruna, Nikita, Puneet, Varsha and Ritika are five friends. They study in different schools at different places. Two of those schools are The Doon School and The Valley school. All of the persons mentioned are the permanent residents of different localities of Delhi viz. Ganesh nagar, Pandav nagar, Laxmi nagar, Paharganj and Geeta Colony. The person who studies in Greenwood School lives in Paharganj while Ritika lives in Ganesh nagar. Aruna studies in The Valley school and lives in Laxmi nagar. Nikita studies neither in St. Xavier’s high School nor in Agra Public School and lives in Pandav Nagar. Varsha doesn’t study in St. Xavier’s High School and lives in Geeta Colony.