B.Sc

Hi Shubham, marks of a single subject is not considered. Average of four best subjects in class 12th board will be considered for admission. If you are getting good marks in the average then only you can get admission in Hindu College or St. Stephen College. You can apply for the same via online.
Best of luck.

as per my knowledge all the college which is affiliated with Du offers this course.plz apply for this course
You can apply in HANSHRAJ college

Yes, you are eligible for this course. Please apply for this course.

You could pursue some other interesting courses instead of dropping a year.

Yes, there are some chances for you to get the college according to your percentage. You can apply for admission. Good luck.

As your percentage are low so, your chance are less to get a seat. You might get the college. Its good if you take some back to take admission as there is very less chance of admission.
good luck.

The fees shown in the link is the full three year fees , here is link for your help
kindly visit
https://www.shiksha.com/science/course/b-sc-hons-in-forensic-sciences-shree-guru-gobind-singh-tricentenary-university-sgt-gurgaon-280650

Kindly predict your college in this college predictor. JEE Main rank predictor is an online tool which predicts the candidates rank range and probable colleges based on the difficulty level of the examination, average marks scored in JEE Main and seats available in IITs, NITs, GFTIs, and other SFTIs. The rank predicted might not be accurate but it certainly does give an idea to the aspirant. Know your college admission chances based on your JEE Main Rank, Home State, Caste, Gender, etc. Here https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Hope this helps.
Good Luck.

You have to score more than 60% marks in entrance.