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