B.Sc Ranking

It's possible. If you are passionate about this, go for CS and learn interdisciplinary course through online education.

Dear Girish, with these low marks, it is difficult to get admission in DU, because of the high cut off. You should try for admission in good private universities like LPU, Manipal University, Amity, etc. Where you can GET admission based on their tests too. All these universities offer world class learning atmosphere to students along with good placements. Check their websites for more details. Good luck.

Yes, you can choose Dr. Ambedkar and also AIHM-Chandigarh, IHM-Chennai and IHM-Jaipur.
All are good institutes.

Yes, your rank is good enough to get a good college for B.Sc or BHMS.

Yes, you are eligible for 2nd counselling and there are chances to get this college.