There are two blocks, A and B. Block A is to the left of B. Block A contains one small yellow triangle, one big blue square and a big blue triangle. To the right of and below the big blue triangle there is the small yellow triangle. It is near to the big blue square. Block B contains a medium blue square and a medium blue triangle. To the left of the medium blue triangle is the medium blue square.
Which object is to the left of a medium blue square? the big blue square or the small triangle?
the big blue square  the small triangle  both of them none of them