We have three blocks, A, B and C. There is a big blue triangle in block A. Then, we have block B with one big black triangle, one medium yellow circle and a small black circle in it. There is also a medium blue triangle in this block. Near to the medium yellow circle which is below the small black circle is the big black triangle. The medium yellow circle is touching the bottom edge of this block. The big black triangle is below the medium blue triangle. The small black circle is to the left of and below the medium blue triangle. Finally, above block B we have block C. It is to the left of block A. It has a small blue triangle, a small yellow triangle and a big yellow circle. To the left of the big yellow circle which is above a medium yellow triangle is the small blue triangle. A big black square is to the left of the small yellow triangle. The small yellow triangle is touching the right edge of this block. The big yellow circle is touching the right edge of this block. The small blue triangle is above the medium yellow triangle. To the left of the medium yellow triangle is the big black square.
Which object is to the left of a big blue triangle? the small blue triangle or the medium yellow triangle?
the small blue triangle  the medium yellow triangle  both of them none of them