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