I would like to get admissions in medical colleges under delhi university so is it necessary to apply for examinations of delhi university or neet is enough for that

Hi Hridya, as per your query i would like to tell you that in order to get admission in any medical college all over India you have to appear in NEET UG exam as on the basis of marks obtained in the exam you'll get the college. If you belong to Delhi then you can apply under 85% state quota or under 15% all India quota if you belong to any other state. Remember cutoff varies every year depending on number of students appearing in exam, difficulty level of exam, students scoring more than you and your category.
Hope this helps