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