With a score of 543, your rank might be approximately between 23695-27650. This is an expected rank range: https://medicine.careers360.com/articles/neet-result-marks-vs-rank .In 2019, under State Quota, 475 marks secured a seat in Mandya Institute of Medical Sciences under OBC Category. Going by that, you do have decent chances for seat in this College. Now this is based on 2019 data and cut offs change every year. 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. For complete list of colleges that you may have a shot at, please use our College predictor: https://medicine.careers360.com/neet-college-predictor?