With a score of 500, your rank might be approximately between 45023-51086 . This is an expected rank range: https://medicine.careers360.com/articles/neet-result-marks-vs-rank . Now regarding the Colleges that you may have a shot at, MBBS is difficult because in 2019, the cut off for GMSc for General Category was 575. For BDS, you will need more than 525. Again this is about GMCs. And you might have border line chances for BAMS/BHMS. Having said that, 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 a complete list of colleges that you may have a shot at, please use our College predictor: https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer