Hello student,
In Bihar, 540 marks remained to be a safe zone for the general category under the all India quota and a score of 530 or above was a safe zone for the general category candidates under state quota, when comparing the results of previous years. Please go through the following link to know about the cut off's and ranks for the previous years and calculate your chances of selection
https://medicine.careers360.com/articles/neet-cutoff-bihar
Good luck