We have three blocks, A, B and C. Block A contains a small yellow square. Block B is to the left of block A. It has one small black triangle and a small blue triangle. Above the small blue triangle there is the small black triangle. Finally, there is block C above block A. It has one medium yellow triangle. The medium yellow triangle is below a small blue square.
Which object is above a small yellow square? the small blue square or the black triangle?
the small blue square  the black triangle  both of them none of them