Delhi/NCR

Hello Anik,
Being a professional lifestyle photographer, it is my recommendation that you don't have to go to photography college to learn it. You can do some short term photography courses. You need to learn basics and advance tricks. Mostly, it's about seeing, feeling the moment and capturing the best possible perspective of that situation.
If you really love photography and also want to make money while doing it, then you can get a degree in mass communication or visual communication. To get a degree, you can choose any steam in class 12th.
All the best.

You may refer to following link for list of top MBA B-Schools in NCR:
https://www.shiksha.com/mba/ranking/top-mba-colleges-delhi-ncr/2-0-0-10223-0

Hi,
IBMR has various tie-ups with institutions and provides many certifications and has better brand resonance with recruiting companies:
https://www.shiksha.com/mba/course/mba-pgpm-ibmr-business-school-gurgaon/107937

Hi,
You can get admission in any B.Tech college but for that you have to clear their particular admission criteria. As you have not mentioned any of your exams rank, it is quite difficult to assume as for which college you will be selected in. But, as you have mentioned your 12th CGPA to be 7, there would be many private colleges which will provide you the admission. You can also try your luck Sharda, Galgotias or GLA.

No, it is not possible at all with low graduation marks. Some top colleges also provide based on your score in entrance. If you appear for CAT and if you can score around 99 percentile then you may get calls from the new IIMs and also IIM, Calcutta. Otherwise, some private college may give you admission.

In improvement exam only those subject marks get changed, which you are going to write again, other remain the same.

Every course has equal job opportunities. It depends on our skills and abilities, where we are best suited. So, analyse your skills and you will get answer on your own. Opt for either life science or nursing. Nursing is specific, where you will bound only in nursing field. But, if you opt life science, it may lead you towards many opportunities.