Study the following information carefully and answer the given questions.
• P, Q, R, S, T, V and W are sitting in a straight line facing North. Each one of them lives on a different floor in the same building which is numbered from one to seven.
• Q sits fourth to the left of the person living on the 6th floor. Either Q or the person living on 6th floor sits at the extreme ends of the line.
• Only one person sits between Q and W. W lives on the 3rd floor. The person living on the 1st floor sits third to the right of S. S is not an immediate neoghbour of W. only one person lives between T and the person who lives on the 2nd floor.
• P and R are immediate neighbours of each other. P does not live on 6th floor. One who lives on 5th floor sits third to right of the one who lives on 7th floor.
Who amongst the following lives on the 4th floor?
A P B Q C R D S E V