There are three blocks. We call them A, B and C. Block A is below C. Block B is below A. Block A has two medium black squares. A medium yellow square is touching the bottom edge of this block. It is below medium black square number one and medium black square number two. Medium black square number one is below medium black square number two. Block B contains a medium black square and a medium yellow square. Below the medium yellow square is the medium black square. Block C has a medium blue square.
What is above the thing which is touching the bottom edge of a block? a medium black square number two or a medium black square that is in block B?
medium black square  number two medium black square  that is in block B both of them none of them