Four of the following five are alike in a certain way based on the given arrangement and thus form a group. Which is the one that does not belong to that group?

Study the following information carefully and answer the question given below: There are eight people P, Q, R, S, T, U, V and W are living in a 8 floor Building on different floors from top to bottom (such as ground floor is numbered as 1 and top floor is numbered as 8) but not necessarily in the same order. There is a gap of three floors between Q and S and both of them live on odd number of floors. U lives just above W who lives on an even numbered floor. P lives on floor number 6. Only one person lives between Q and T. S lives above P. Three persons live between R and W.