There are three blocks, A, B and C. Block A contains a medium yellow triangle and a medium yellow square. Below, near to and to the left of the medium yellow square there is the medium yellow triangle. Block B is to the left of block A. It contains a small black circle. Below block B there is block C which has one big black circle, a big yellow square and a big blue triangle. The big black circle is touching the right edge of this block. It is to the right of the big blue triangle and the big yellow square.
Which object is below a black circle? the medium yellow square or the big yellow square?
the medium yellow square  the big yellow square  both of them none of them