There are three blocks, A, B and C. Block A is to the left of block B and to the right of block C. Block A has a big blue square and a medium black triangle. This block also has a medium blue triangle. To the right of the medium black triangle which is above and to the right of a medium yellow square there is the medium blue triangle. The big blue square is above and to the right of the medium yellow square. Block B contains one small blue triangle. Block C contains a big blue square.
Which object is to the right of a big blue square? the yellow object or the black triangle?
the yellow object the black triangle  both of them none of them