Depth of Knowledge tested at GMAT - Need clarification

I have been wondering about his for quite a while...needed to get it clarified
For students like me (INDIAN) who are to appear for tests in addition to the GMAT (like the IIM CAT-2010), some of the topics in QUANT are very advanced as compared to those that appear on the GMAT...
For eg: In Geometry, there might be certain theorems like the Basic Proportionality Theorem etc. which aid problem solving...
However, in the GMAT I believe the stress is not on a lot of theorems and formulas, but general problem solving..

So lets say on the GMAT, I get a DS question asking me to solve a particular problem on, lets say, Geometry...and I, being an Indian student, know that it can easily be solved by using the said theorem and suppose with that knowledge I get a answer B ( by finding that it is sufficient to answer the question with statement 2 alone ).

Now it is possible for another student, who knows nothing about the above mentioned theorem ( has never learned anything of the sort in his entire prep), solves the DS question and gets an answer C ( that is by using both the statements 1 & 2 ),

I have taken Geometry as a topic only for stating an example. It might occur in other topics too.

My questions are -
1) Can such a situation happen on the GMAT?
2) If it does, then what is the solution?


R J