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