Seven blocks P, Q, R, S, T, U and V are stacked one over the another in random order. The lowermost block is numbered as 1, the block above it is numbered 2, and so on till the topmost block is numbered 7.
Only four blocks are below the block S. Only two blocks are below block R. Block Q is placed at the lowest position. Block T is immediately above block Q. Block P is on one of the blocks above block U but on one of the blocks below block V. Which block is numbered 2 ?
1
Q
2
T
3
U
4
S