General Studies · Box Puzzle

Seven boxes-P, Q, R, S, T, U, and V-are placed one above another, but not necessarily in the same order. Only three boxes are placed above U. Only one box is placed between R and U. Only three boxes are placed between R and S. S is placed somewhere above U. Q is placed immediately below S. T is placed somewhere above V. P is placed neither immediately above nor immediately below R. Which box is placed at the bottom?