but the Truth is I am Nishant, and Nishant Xavier.

Why is this question so difficult to answer?
There have been 3 accounts - Nishant, XavierSem, and now Nishant Xavier.
1. Are you the same person that created all 3 accounts?
2. Are you the same person that posted on all 3 accounts?
3. Are you the ONLY person who posted/posts on all 3 accounts?
Your answers will tell us all we need to know.