hi!We cannot tell the marks as marks vs ranks vary year to year, but definitely the rank and percentile can be determined. The minimum rank is around 31,000 which will fetch you biotechnology in MNIT Allahabad.

lets come to the percentile now.Hence, your percentile should be greater than:

(1200000-31000)*100/1200000

= 97.41 percentile 

Hello dear, 

In order to get admission in MNNIT ALLAHABAD you should have to bring your rank under 5000 in general category, for this you have to bring percentile above 99.5 in jee mains in order to secure your seat in this college. 

For further details you can check the link provided -

https://engineering.careers360.com/articles/jee-main-cutoff-for-mnnit-allahabad