At about 69k rank and obc rank 18758 you can not get cs/it at iet lucknow as this is a good college and cutoffs of this college are not very high so there is no point being in false hope but yes you can participate in the counselling and hope for the best also you can sit in spot round as well as in internal sliding so you might just get a chance in iet lucknow for cs/it this year round3 cutoff for all india category was about 35k for cs so by that it is tough to get at 69k rank but yes you can predict your college by this link

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer