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