Hello K Durgaprasad , With a score of 350, your rank might be approximately between 181904-194475 . 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, 350 is a tad less score for a seat under OBC Category. You will need atleast 450 and above. Now this is based on 2019 data and cut offs change every year. Cut offs change every year depending on various factors. We are not say directly that you can get seat or not on the basis of your marks and all but a careers 360 college predictor tool will be say to you about the college for you here:
https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

Hope it will be helpful for you :)