We have three blocks, A, B and C. Block A has one medium blue square and a medium yellow square. Below the medium yellow square there is the medium blue square. Block B is below block A. It contains a medium blue square. Finally, we have block C to the left of block B. It contains two medium blue squares. Below medium blue square number one is 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.
Which object is to the left of a medium blue square? the medium black square or the yellow shape?
the medium black square  the yellow shape both of them none of them