There are three blocks, A, B and C. Block C is above B and block A is below C. Block A contains a medium yellow square. Block B has a medium blue square. And block C has two medium black squares. Medium black square number one is below a medium blue square and medium black square number two. The medium blue square is below 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