There are three blocks. Lets call them A, B and C. There is a medium black square in block A. Block B is to the left of block A. It has two medium yellow squares. Medium yellow square number one is below medium yellow square number two. Finally, we have block C to the left of block A. It contains two medium blue squares. It also has a medium black square. Medium blue square number one is below medium blue square number two. The medium black square is below medium blue square number two. It is below medium blue square number one.
Which object is to the left of a medium black 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