We have three blocks, A, B and C. There is a medium blue square in block A. Then, we have block B. It has one big yellow circle and a big blue circle. Above the big blue circle there is the big yellow circle. Below and near to a small black square there is the big blue circle. Block C is to the left of block A and above block B. It contains two medium yellow triangles. Medium yellow triangle number one is touching the right edge of this block. Medium yellow triangle number two is touching the left edge of this block. A big blue square is touching the right edge of this block. A big black square is touching the bottom edge of this block. The big blue square is above medium yellow triangle number two. The big black square is below and to the right of medium yellow triangle number two. Below the big blue square is medium yellow triangle number one. This object is to the right of medium yellow triangle number two.
What is to the left of the medium blue square? a medium yellow triangle which is touching the left edge of a block or a big blue square?
medium yellow triangle  which is touching the left edge of a block  big blue square  both of them none of them