Sandeep, South India has the the best Medical Colleges. Few of them are:

• Stanley Medical College
• Madras Medical College
• St. John's Medical Collegge
• CMC Vellore
• Osmania Medical College
• Apollo Institute of Medical Sciences
• Goa Medical College

Now there are Government Medical Colleges, Private Medical Colleges and Deemed/Central Universities.  You haven't mentioned your Category and the State you belong to. But in a nut shell, to be able to study in any GMC of South India, you need to participate in All India Counselling. 15% of the seats of all GMCs are transferred to a central pool and this is called All India Quota. Now if you belong to General Category, you will need atleast 600 and above for a seat in a GMC under All India Counselling. If you belong to Reserved Categories, you might need 550 atleast. Now this is a general information. Cut offs change every year depending on various factors such as no.of Candidates appearing for the exam, no.of Candidates qualified, top NEET score and difficulty of the exam. To help you with your NEET preparation, we have NEET Knockout packages that you can check at: https://learn.careers360.com/knockout-neet-may/. To help you during admission and counselling, we have https://www.careers360.com/mbbs-companion.