We have three blocks. We call them A, B and C. Block C is to the left of B. Block A is above C. Block A has one medium blue square. Block B contains two medium black squares. A medium blue square is below medium black square number one. Medium black square number one is below medium black square number two. The medium blue square is touching the bottom edge of this block. This shape is below medium black square number two. And block C contains a medium black square. Below a medium yellow square is the medium black square.
What is below the yellow shape? a medium black square number one or a medium black square which is in block C?
medium black square  number one medium black square  which is in block C both of them none of them