Science

Yes, you can get admission as the eligibility is you need to be 10+2 passed from recognized university. You can apply online with required information.

Yes, you can seek for admissions in DU. You can go through DU website for the details.

You can take only one course at one time in your admission process. So go for suitable course from IGNOU and another course from distance if you can cope up 2 studies at a time.

You can apply for the central counselling.

You might have a chance if you have any reservation criteria else give it a try. You have very great chance to get into this institute with this rank. Attend the counselling and choose your options appropriately. Try Shiksha college predictor for better analysis.