MNNIT Allahabad - Motilal Nehru National Institute of Technology

Don't think so.
Let's look with different aspects MNNIT is top 5 in NIT, placement stats 94% approximately, MHRD ranking 48, highest package 45 lakh and as a student of MNNIT I can say coding culture is great in MNNIT.
While in IIIT highest package is 39 lakh but I believe that there are less opportunities in IIIT as compared to MNNIT.
Not only placement matters, extracurricular activities also plays a great role in the development of the students.
We have Tech fest (avishkar), culrav, Renaissance, athletic meet and many more things to keep you busy and make you feel alive.

If you're opting for Computer Science, MNNIT Allahabad is a better choice because of it's placements and amazing senior junior interaction and in other measures too NIT Allahabad is far better than NIT Surat. Best of luck.

It all depends on your JEE Mains rank and rank is different for different category.
If you belong to general category, your rank must be under 4.5k(240 marks)(for both HM and OS).
You are OBC then your OBC rank must be approximate 1.5K[220 marks] to get CSE/IT in NIT, Allahabad and if you belong SC/ST category, your SC/ST rank must be approximate under 1K[170 marks].

It's quite difficult, but you can get biotechnology or production and then you can change your branch if your CPI is good in the 1st year.

I think it's difficult for you to get MNNIT CSE if you belong to general category. According to me, both are good, but in MNNIT, you can opt for IT and after 1st year if your CPI is good (above 8.5) then you can change your branch to CSE.

If you want a good coding culture, then you should go for IIIT, Allahabad.

Well, if your general rank is 96500 then you won't be getting any government college. You should instead go for private colleges with a desirable branch.

NIT, Trichy is one of the best institutes for CSE. It is top among the NITs and placements for CSE are pretty good here. The only issue you might have is of adjusting to the new environment. Also, Delhi is much better to live than Trichy. So take your decision considering all the facts.

It think there is no chance.