We have three blocks, A, B and C. Block A contains a medium black square. Block B is below block A. It has one medium yellow square. Above block B there is block C with two medium blue squares in it. A medium black square is touching the bottom edge of this block. It also has a medium yellow square. This object is below medium blue square number one and medium blue square number two. Below medium blue square number two , medium blue square number one and the medium yellow square there is the medium black square.
Which object is below a medium blue square? the medium yellow square which is in block C or the medium yellow square that is in block B?
the medium yellow square  which is in block C the medium yellow square  that is in block B both of them none of them