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