We have three blocks, A, B and C. Two medium black squares and two other medium blue squares are in block A. Medium black square number one is below medium blue square number two and medium black square number two. Below medium blue square number two there is medium black square number two. Below medium black square number two and medium blue square number two is medium blue square number one. Block B is above block A. It contains a medium yellow square. Above block A there is block C with one medium yellow square in it.
Which object is below a medium yellow square? medium blue square number one or medium blue square number two?
medium blue square  number one medium blue square  number two both of them none of them