Assam

May be but not sure. For more confirmation, register at following: http://fasttrack.cuchd.in
Fill all the basic details and desired exam center.

There is a low chances of getting seat in NIT's as your percentile was not sufficient to get seat in any NIT's, because of heavy competition and demand of seats. So, just give a try. All the best.

Only women can apply for this course. The army is already dominated with male candidates.

MBA in Guwahati University will be better because of their study methodology and Placements as compared to Assam Institute of Management.

Yes, if you clear the TNEA entrance exam with a good score.

Hello,
The eligibility criteria for filling lateral entry entrance test for DTU is-
The candidates seeking admission to the B.Tech lateral entry programmes should possess a state Diploma of three years in any branch of engineering or equivalent examination from a DTU recognized university. The candidates should secure a minimum of 60% (50-55% for SC/ST) marks in all the semesters as an aggregate.

You can take mass communication as this course has better career opportunities ahead. You will get good opportunities for you after pursuing this.
Good luck.

NIT Agartala is the Second Best after Silchar in NE states. Thus as per my view I would suggest you to go for SILCHAR -NIT is the best in terms of Placement
Infrastructure, Environment. Etc. Thus this purely on my views and as per this factor.