sir i m getting 138 marks in 2010 jee....nd i m in OBC..what would be my rank in jee(OBC )..nd will i get a seat in IIT???

Please check the cut off of IIT JEE 2010:

http://www.askiitians.com/IIT-JEE-2010-Cut-Offs.aspx

And for detailed branch allotment rank wise as per IIT JEE 2008 rank list is given below:

http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx

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