Dear Shreya,

Minimum cut off for any NIT(including MNNIT Allahabad) is different for Individual B.Tech domains .. and this cut off varies every year due to some unavoidable factors like Seat capacity, difficulty level of question, no of students appeared etc .

Well, you can find the cut off details of NIT Allahabad individually for every category from this link:

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

Hope this helps !