There are three blocks. We call them A, B and C. Block A is above B. Block C is above A. Block A has one medium black square. Block B has one medium blue square. Block C has two medium black squares. This block also contains one medium yellow square. Below a medium blue square and medium black square number two is the medium yellow square. Medium black square number one is below the medium blue square and medium black square number two. The medium blue square is below medium black square number two.
Which object is above a medium black square? the medium blue square that is in block B or the medium blue square that is in block C?
the medium blue square  that is in block B the medium blue square  that is in block C both of them none of them