There are three blocks, A, B and C. Block A is to the right of C and block C is to the right of B. Block A has two medium blue squares. Medium blue square number one is touching the bottom edge of this block. It is below medium blue square number two. Block B has one medium yellow square. And block C contains two medium blue squares. This block also contains one medium black square. It is below medium blue square number two. Medium blue square number one is touching the bottom edge of this block. It is below medium blue square number two and the medium black square.
Which object is to the left of a medium blue square? the medium yellow square or the medium black square?
the medium yellow square  the medium black square  both of them none of them