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