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