There are three blocks, A, B and C. Block B is below C. Block C is below A. Block A has a medium black square. The medium black square is below a medium blue square and a medium yellow square. Below the medium yellow square is the medium blue square. Block B has one medium blue square. And block C has one medium yellow square.
Which object is above a medium blue square? the medium yellow square that is in block A or the medium yellow square which is in block C?
the medium yellow square  that is in block A the medium yellow square  which is in block C both of them none of them