Engineering

In Bennett, you can get any branch based on 1st JEE score. 2nd is based on 12th result.

All these 3 branches are different. Major difference between ECE and electronics is the paper of communications
4-5 paper difference in ECE and telecommunication engineering. Candidate can doing all the branches and placed in same profile. Some college offering electronics telecommunication also.

Yes, India is preferred for Aeronautical Engineering as compare to other countries in criteria of fees. There are numerous of colleges which provide which provide B.Tech degree along with decent placement. So, as per my idea, if you want to pursue career in this field select a good college for that.

Yes, you are eligible.

No, MHT-CET is the competitive exam conducted by DTE-Maharashtra to get admission in technical institutes which are governed by Maharashtra State Government. Indian Maritime University is in Chennai. So, irrespective of branch, MJT-CET score is not to be validated for admission in this university.
A