There are three blocks, A, B and C. Block C is to the right of and B is to the left of A. Block A contains two medium black squares. This block also contains one medium blue square. It is below medium black square number two. Medium black square number one is below the medium blue square and medium black square number two. Block B contains a medium yellow square. And block C has two medium yellow squares. Below medium yellow square number two there is medium yellow square number one.
Which object is to the left of a medium yellow 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