CBSE 10th

Dear Prashant Singh,
We cannot predict exactly, but 83 percentile in CMAT is a good score. You may get both organisations. Apply for both and wait and see.
All the best.

You can chose any stream but do MBA from legacy IIMs to get your dream salary job. If you chase money you will not be able to make your professional career. In order to full-fill your dreams have to have a detailed plan and its execution to perfection to achieve your goals & objectives.

NTSE exam can be helpful for you to put your first step in competitive world.

You will have to opt for PCB, if you wish to become an agro-inspector.
Agricultural Inspectors require a high school diploma or GED at the minimum. Many positions prefer an associate's degree in biology, animal science, agricultural science, or another related field. However, some positions prefer candidates with a bachelor's degree in similar majors.
In addition, Agricultural Inspectors will likely go through in-depth job training, becoming better acquainted with the many government regulations regarding the production and processing of food.

Take the subject which interests you. There are huge career opportunities in arts, commerce and science.

This is a myth that state board students are weaker as compared to CBSE and ICSE ones. But the reality is strikingly opposite, in fact people from state board are going for IITs. So, don't get disheartened, prepare for it. As far as the eligibility is concerned you need to be in 20 percentile to get into IITs.