There are three blocks, A, B and C. Block A has two medium blue squares. Below medium blue square number two there is medium blue square number one. It also contains one medium yellow square. Below medium blue square number one and medium blue square number two there is the medium yellow square. Then, we have block B with a medium yellow square in it. Finally, above block A we have block C. It is above block B. It contains a medium black square.
What is below the black thing? a medium blue square number one or a medium blue square number two?
medium blue square  number one medium blue square  number two both of them none of them