There are three blocks, A, B and C. Block A is to the left of C and block C is to the left of B. Block A contains a small yellow square and one big yellow square. The big yellow square is touching the right edge of this block. Below the big yellow square is the small yellow square. Block B contains a big blue circle, one small black circle and one medium blue circle. The big blue circle is touching the right edge of this block. Above the medium blue circle there is the small black circle. The big blue circle is above the medium blue circle. It is to the right of the small black circle. Block C has one big black square.
What is to the left of the medium thing? a small black circle or a big black square?
small black circle  big black square  both of them none of them