Direction :Study the following information carefully and answer the questions given below:
Six friends M, N, O, P, Q and R live in a six- storey building. The ground floor is numbered 1 and the topmost floor is numbered 6. Q lives neither on the top floor nor on the bottom. There are two persons between the floors on which P and Q live. Only one floor is there between M and N. The floor on which R lives is below the floor on which Q lives. The floor of O is just above the floor on which N lives.

Q:

How many floors are there between P and R? 

• 1
  Three
• 2
  Four
• 3
  None
• 4
  Either 2 or 3
• 5
  None of these