Degree

It doesn't matter from which stream you are for doing law you simply have passed class 12th with minimum 50%. Although, an entry point to the most coveted National Law Universities that offer five years of integrated law programmes, is CommonLawAdmissionTest or CLAT/SET/ISAT. Science students are considered high on aptitude and hence are as strong contenders as any other stream to prepare for CLAT /SET/ISAT. All the best.
Thank you.

Hello Vraj Patel,
It is very nice to hear from you that you intend to become a manager in forest and mining areas and because of this aim in life, you want to know which stream of engineering you should select while doing your M.Tech. Correct?
I feel you can do your post-graduation in mining engineering or in the environmental engineering. Both these specialisations will allow you to seek placement as a mining manager or forest manager.

In 2013, an expert committee of the UGC had recommended that students enrolled in a regular degree course should be allowed to pursue an additional degree, simultaneously under open or distance education mode from the same or different university.

There are so many courses available in the study circle:
I would like to refer that you can join hotel management and aviation courses that builds up your future all so.

No,
There is no undergraduate course or degree, which include both computer and economics as the two subjects are way different.

Yes, definitely ! You need to qualify either GATE or Institute specific exams. A few institutes offer integrated M.Tech + Ph.D. option you can explore that option. JNU, BHU, IARI, IITs are a good option.

AMIE is recognised by government. Of India and is valid for IES UPSC, GATE IES and government Jobs (where Eq. B.Tech degree is also mentioned).

Absolutely no. But, it will help you to achieve the aim point.