IIT Preparation

The best books are :
1. NCERT (for PCM)
2. HC Verma (for physics)
3. OP Tandon (for chemistry)
4. RD Sharma and RS Aggarwal (for maths)

I'll prefer you to join any other coaching institute like Allen and Resonance as the coaching institute mentioned by you is also quite good. But the main problem is that their passing ratio is not that good.

I'll suggest you to opt for FIITJEE as this coaching institute has good faculty and also has the easiest way to teach students the most difficult questions.

It will be from 2019 onwards.

Pankaj Gandhi in Pune is good because its locality is good and the teachers give their best. Also, in Pune, you can also do internship.

Hi,
Well, it is difficult to get any government college with 71%. Most of the engineering colleges give more preference to the entrance exam score for the entrance.
Regards.

Hi there!
I will suggest you to complete your basics first, first complete Ncert, then you can choose books of Arihant etc. Or its better to buy any coaching institutions material as you will can practice properly from that and once these are done solve 39 previous year question bank, always remember

Hi Divyanshu,
Yes, the minimum marks are 75 percent, so it will be useless.
Go for the improvement exams.
My best wishes.
All the very best.

Let me tell you one simple thing that, for engineering, there is nothing better than the IIT. So if you have any doubts and comparison which includes IIT then just shift towards IIT.
All the very best.

Apart from IITs, for engineering, NITs are the other best colleges for sure. But there are several good colleges and universities also like BITS and Jadavpur University.
All the very best.
Choose wisely.