Hello

MNNIT Allahabad is much reputated and have good ranking in  compare wit nit jalandhar. So going to reputated college will give you a gret exposure and placement and internship opportunity is more in mnnit.

Since you want to do mba so basically institute doesn't matter it upon on your entrance exam score .

But still go for mnnit allahabad over nit jalandhar

Feelfree to ask

Good Luck...