Hi Vibhanshu,
According to your rank range predictions I see that your marks lie somewhere above the 520 range. This means that yes you have a good enough chance of getting a government college MBBS seat through 85% state quota as the last year's closing marks was at Dr. Ram Manohar Lohiya Medical Institute, Lucknow for the marks of 469 and then at U.P. Rural Institute of Medical Sciences & Research, Etawah for the rank 24680 with marks 492.
Thank you and all the best.