We have three blocks. We call them A, B and C. Block A contains a medium yellow square. Block B is to the left of block A. It contains two medium blue squares. Below medium blue square number two there is medium blue square number one. It is touching the bottom edge of this block. It also contains one medium black square. It is below medium blue square number two. Below the black object which is below medium blue square number two is medium blue square number one. To the left of block A there is block C. It has two medium blue squares. Below medium blue square number two is medium blue square number one.
Which object is below a medium blue square? the medium yellow square or the medium black square?
the medium yellow square  the medium black square  both of them none of them