There are three blocks, A, B and C. Block A contains a medium black square. Below block A is block B which has a medium black square. One medium blue square is also touching the bottom edge of this block. Below the medium black square is the medium blue square. Above block B there is block C with one medium blue square in it. Below the medium blue square is a medium black square.
Which object is below a medium blue square? the medium black square which is in block A or the medium black square that is in block B?
the medium black square  which is in block A the medium black square  that is in block B both of them none of them