There are three blocks, A, B and C. Block C is above A. Block A is below B. Block A has one medium yellow square. Block B contains one medium blue square. Block C contains three medium black squares. Medium black square number one is below medium black square number three and medium black square number two. Below medium black square number three there is medium black square number two.
Which object is above a medium square? medium black square number two or medium black square number one?
medium black square  number two medium black square  number one both of them none of them