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