Which of the following does not belong to the group?

Study the following information carefully and answer the given questions: Some students of class X appears for a test of different IITs either on 1st Week or 3rd Week of different months – March, April, June and October. No two tests are of same subjects. P and S appears for the test of IIT Bangalore and IIT Chennai respectively. R appears for the test before
V. Only 4 persons can appear between the ones who are appearing for IIT Meerut and IIT Kanpur. T appears for the test of IIT Guwahati on 1st Week in the month having 30 days. S does not appear in April. Only 2 persons appear between Q and S. Only one person who appears for the test of IIT Mumbai appears between R and W. Only 3 persons can appear between P and W,who appears for the test of IIT Pune. The one who appears on 3rd Week of March appears for test of IIT Meerut. Both Q and V appears on the same date. 3 persons can appear for the test between T and U. Q does not appear for IIT Meerut. One of the student appears for IIT Delhi.