There are three blocks, A, B and C. Block A is above and B is below C. Block A contains one medium blue square. Block B has one medium black square. Block C contains one medium black square and one medium blue square. Below the medium blue square and a medium yellow square is the medium black square. Below the medium yellow square is the medium blue square.
Which object is above a medium black square? the medium blue square that is in block C or the medium blue square that is in block A?
the medium blue square  that is in block C the medium blue square  that is in block A both of them none of them