There are three blocks, A, B and C. Block B is above A and block A is above C. Block A contains a medium black square. Block B contains two small yellow triangles. Small yellow triangle number one is below and near to a small blue triangle. It is to the right of small yellow triangle number two. One medium black circle is also in this block. It is above and to the right of small yellow triangle number two. Block C contains one big black square and one big blue triangle. Near to the big blue triangle there is the big black square. The big blue triangle is touching the right edge of this block.
Which object is above a small yellow triangle? the big black square or the medium circle?
the big black square  the medium circle  both of them none of them