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