Thanks PPM and all friends in the forum.
But i first applied from buffalo then they transferred my file to detroit for interview at that time i was already in Canada. I applied for US visa but they refused saying u r not PR or citizen to canada so apply from ur home country for us visa. Then Detroit office further transferred my file to CHC india for further Interview and processing. Finally instead of interview letter i got refusal letter from chc n.delhi mentioning u earned only 63 points.
If i again apply i m worried same thing might happen.