General Studies · Puzzle Test

Seven boxes P, Q, R, S, T, U, and V are kept one over the other but not necessarily in the same order. Only four boxes are kept between R and S. Only three boxes are kept between Q and T. V is kept at one of the positions above P, but not immediately above P. Q is kept at one of the positions above V. Only two boxes are kept between S and U. How many boxes are kept between R and P?