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