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