Dear Ram, Tamilnadu has the highest cut offs. You haven't mentioned your Category. In 2018, under General Category, 593 marks got Rajah Muthiah Medical College. Infact, 593 was the least marks in General Category that secured a Medical seat under State Quota. The rest all colleges had cut offs of more than 600. In this connection, a Government Medical Seat with those marks in General Category is difficult. ar Rajiv, Tamilnadu has the highest cut offs. In 2018, under State Quota, for BC category, 593 marks secured a medical sear in IRT Perundurai Medical College. That was the least cut off. Sorry to disappoint you but 517 is a less score for BC category. Under State Quota, 543 marks secured a Medical seat in Rajah Mutiah Medical College. This was the least marks that got a seat in a Government Medical College under SC Category. Even for Lrivate Medical Colleges, the score was 539. With this score, to be honest, a Medical seat in Tamilnadu is difficult. Neverthless, cut offs change every year and are dependant on various factors like no.of candidates appearing for the exam, no.of seats available, top NEET score and difficulty of the exam. You may have to wait until official answer key is released so as to assess your score correct.