I am Vikash Tripathi, I got AIR-18 in GATE-2017. I want to say thank you to Kulwant Sir, beacause this was not possible without his guidance. He is a great teachers who always supports and motivate his students. His counter examples are very useful to crack any exam. I know a single word is not enough but I am heartly thankful to you.Thanks once again Kulwant Sir.