There are three blocks. Lets call them A, B and C. Block C is below block A and above block B. Block A contains a medium black square. Block B has one medium black square, a medium yellow square and a medium blue square. The medium yellow square is below the medium blue square. Below the medium yellow square is the medium black square. This shape is below the medium blue square. Block C has a medium black square.
Which object is below a medium black square? the medium blue square or the yellow thing?
the medium blue square  the yellow thing both of them none of them