There are two blocks, A and B. Block A is above B. Block A contains one medium black triangle, one medium yellow circle and a small black square. Above a big yellow circle and the medium yellow circle is the medium black triangle. Near to and above the small black square which is to the left of the big yellow circle is the medium yellow circle. Block B has one big blue square and one medium blue triangle. Far from and to the left of the medium blue triangle is the big blue square. Below the medium blue triangle there is a medium black circle. A big black circle is below the medium blue triangle. It is to the right of the big blue square.
Which object is below a big yellow circle? the medium black triangle or the medium blue triangle?
the medium black triangle  the medium blue triangle  both of them none of them