There are three blocks. We call them A, B and C. Block A contains a big black square. Then, there is block B. It contains a medium black square. Finally, below block A we have block C. It is to the left of block B. It has two medium black circles. To the left of a small yellow square and medium black circle number two is medium black circle number one. It also contains one big yellow triangle. A medium yellow triangle is touching the left edge of this block. It is to the left of the small yellow square.
Which object is below a big black square? medium black circle number one or medium black circle number two?
medium black circle  number one medium black circle  number two both of them none of them