Law

It is practically impossible to do both of them simultaneously as you will need to pursue either 5-year LLB or 3-year LLB along with engineering which neither UGC allows nor its practicality.

Hi,
There are no courses especially in business law although it is a part of curriculum at law schools.
Moreover, there are some universities which offer Diplomas in business laws however it consists of many laws thus you need to know what actually you want as curriculum at NLUs.

Hi,
If you are talking about age limit then it's a no for pursuing LLB.
There is no upper bar as such.

The Institute of Law, Nirma University offers 5-years integrated Programme BA LLB (Hons.) and B.Com LLB (Hons) while the Maharaja Sayajirao University of Baroda offers LLB and BALLB (Hons.). Nirma is a private university while MSU is a government one. The fees have a huge difference and thus the facilities also vary. The extra-curricular activities provided in Nirma are more varied and extensive. Thus if that's your basis for selection then that should be your pick. If the curriculum is in question then they have a similar curriculum with yearly moot courts.

A lot of people do. Mostly those who wish to go for Judiciary/UPSC/academics.

The top colleges are:
NLSIU, Bangalore
NALSAR, Hyderabad
NUJS, Kolkata
NLU, Jodhpur
GNLU, Gandhinagar
You have to appear for the CLAT PG exam to get admission in LLM courses in the NLUs.