Hello Chandra

It would be difficult to tell you exactly the marks required for admission. However, the previous year cutoff for admission to MNNIT Allahabad for Mechanical Engineering for Home State quota for OBC NCL was 3634.
You can go through the previous year cutoff for reference

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

Good Luck!

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