MBA Entrance Exam

Undoubtedly, NMIMS -Mumbai is better than Nirma University.

Yes, marks of Indian global and environment section are taken into consideration for MAT May 2017.

Good colleges accept TANCET score. You need more than 150 marks to get admission in a good college.

TIME institute.

ICET is a state level exam where you can get an admission from the colleges within the state.
CAT is the national level exam, where you can do MBA or PGDM in most reputed colleges and business schools, where the placements are top notch which provide high salaries. But you need to do hard work.
All the best.

Go for MBA from a top institute such as Amity, Manipal or VGU-Jaipur.

CAT score and GD/PI.
Best of luck.

If you give CAT exam, it's better as all MBA colleges in India accept CAT score. But, it's not mandatory. You can also give other management entrance exams like SNAP, NPAT, MAT, XAT, CMAT, etc. and get admission into good MBA colleges in India.