There are three blocks, A, B and C. Block C is to the right of B and block B is below A. Block A contains one medium blue circle and one medium blue triangle. The medium blue circle is to the left of and below the medium blue triangle. Block B has one small black square, a small yellow circle and a big yellow square. A medium yellow square is to the right of the small yellow circle. The small black square is to the right of and above the small yellow circle. This object is far from, to the right of and above the big yellow square. Block C contains a medium yellow triangle and one big black triangle. Below and to the right of the big black triangle is the medium yellow triangle.
What is below the medium blue circle? a medium yellow square or a small black square?
medium yellow square  small black square  both of them none of them