Roshni, to become a Forensic Doctor, you should take up Physics, Biology and Chemistry as your core subjects in your 12th and secure a minimum aggregate of 50% in these 3 subjects. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. Now with this you have to appear for NEET which is the entrance exmination for admission to MBBS, BDS, Ayush and Veterinary courses. Now you should secure atleast 575 and above for a seat in MBBS. MBBS is a 50 month course along with mandatory 1 year internship. You need to then take up Forensic Medicine as your specialisation in your MD/MS. Once you complete your MD/MS you can work as a Forensic Doctor.