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