We have three blocks. We call them A, B and C. One medium yellow square and one medium blue square are in block A. Below the medium blue square is the medium yellow square. Block B is above block A. It has one medium blue square and one medium black square. The medium blue square is touching the bottom edge of this block. It is below the medium black square. Below block A there is block C which has one medium blue square, a medium yellow square and a medium black square. The medium blue square is touching the bottom edge of this block. Below the medium black square is the medium yellow square. Below the square which is below the medium black square there is the medium blue square. It is below the medium black square.
Which object is below a medium black square? the medium yellow square that is in block A or the medium yellow square that is in block C?
the medium yellow square  that is in block A the medium yellow square  that is in block C both of them none of them