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