There are three blocks, A, B and C. Block C is to the left of block A and above block B. Block A has one medium black square. Block B contains one big yellow triangle. One big black circle is also touching the bottom edge of this block. There is also one small yellow square in this block. The big black circle is below the big yellow triangle and the small yellow square. Block C contains a small yellow circle.
Which object is below a small yellow circle? the medium square or the big triangle?
the medium square  the big triangle  both of them none of them