Even I got this Q on my GMATprep.. I had almost chosen a wrong answer before it suddenly flashed to me that square root of any positive number greater than 1 is always greater than 1, be it 1.0001 or 10000.
So, in this question, 2+GT1+GT1= GT 4
I may also point out that I got this question after 10 straight right answers. So IMO either this question is 51 level or this is a test question. If its the former then well, a reason to feel good isn't it :D
My GMAT debrief: from-620-to-710-my-gmat-journey-114437.html