We have three blocks, A, B and C. Block A is below B. Block B is above C. Block A has one medium blue square and one big black square. The medium blue square is to the left of the big black square. The big black square is touching the right edge of this block. Block B contains a medium black square. Block C contains one small yellow triangle. Below a medium black triangle there is the small yellow triangle. Below the medium black triangle is a big yellow square. The small yellow triangle is to the right of and near to the big yellow square.
Which object is below a medium black square? the big yellow square or the small yellow triangle?
the big yellow square  the small yellow triangle  both of them none of them