There are three blocks, A, B and C. Block A contains one big blue triangle. Above block A is block B with a medium blue square, one small yellow circle and one medium yellow square in it. To the left of the medium yellow square is the medium blue square. The small yellow circle is below the medium yellow square. The medium blue square is to the left of the small yellow circle. The medium yellow square is touching the right edge of this block. Finally, there is block C which is to the left of block B. It has one medium blue square and a small yellow triangle. The medium blue square is touching the right edge of this block. Near to the small yellow triangle there is a big yellow circle. Below a big yellow triangle there is the medium blue square. To the right of, above and near to the big yellow circle is the big yellow triangle.
Which object is to the left of a medium blue square? the small yellow triangle or the big blue triangle?
the small yellow triangle  the big blue triangle  both of them none of them