There are three blocks, A, B and C. Block A has a medium black circle. To the right of block A there is block B which has a medium yellow circle. To the right of block B there is block C. It contains one big yellow square, a big black square and one medium black circle. A medium black triangle is touching the left edge of this block. Near to the medium black circle and the big black square is the big yellow square. The big black square is touching the bottom edge of this block. It is below the medium black circle. The medium black triangle is above and to the left of the big black square.
What is to the left of the medium yellow circle? a big yellow square or a medium black circle?
big yellow square  medium black circle  both of them none of them