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