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