There are three blocks, A, B and C. Blocks C and B are below A. Block A has one small black square. Block B has one medium black triangle. Block C contains one big blue square and a medium blue triangle. Far from, to the left of and below the medium blue triangle there is a big yellow triangle.
Which object is below a black square? the big blue square or the medium blue triangle?
the big blue square  the medium blue triangle  both of them none of them