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