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