We are happy to share that our UPSC Prelims exam 2015 answer key had accuracy of 98% when compared to official UPSC answer key. We regret that we could not get answers to 2 questions No. 54 and No. 55 (Set C) correct. For question number 11, we said it would be either D or A, and answer turns out to be D (we thought it would be A though). Next time we will try our best to increase this accuracy.
Official UPSC Answer Key is HERE. You can compare it with our Answer Key posted HERE.
Thank you for your trust and cooperation.