Chennai

Hi,
Congratulations on securing 106 marks in NATA 2019 exams and 90% in CBSE exams. With OBC category, you will have a lot of options of colleges open for you. Once the rank list is announced by TNEA, it would easier to predict. Check the link below to get a list of approved architectural colleges:
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No. You won't be able to get a seat in VIT. Most of the seats get over around 40k rank. You won't be able to get a seat in any of the campus.

You can get CSE at category 3/4/5. I would suggest you consider CSE with Specialisation in Bioinformatics or Information Security. The fee would be less in other CSE branches. I hope this helps.

No. You won't be able to get any seat at this rank in VIT Vellore or Chennai campus. You should try some other college.

Top 5 MBA colleges in Chennai are:-
1) VIT Institute of Management
2) SRM School of Management
3) Loyola School of Management
4) ITM Business School
5) HITS.

There is an entrance exam for it.Just attend the exam and score well to get admission here.Do well and achieve the best.

Can you please elaborate your question, so that I can guide you better?