There are three blocks, A, B and C. Block C is below block A and above block B. Block A has one medium yellow square. Block B has two medium black squares. Medium black square number one is below medium black square number two. Block C contains two medium yellow squares. It also contains a medium blue square. Medium yellow square number one is below medium yellow square number two which is below the medium blue square. It is below the medium blue square.
Which object is below a medium yellow square? medium black square number one or medium black square number two?
medium black square  number one medium black square  number two both of them none of them