With a score of 300, in general, a seat under Category B is also tad difficult. This is because even these seats are filled through State Counselling and the seats are allotted on the basis of merit cum preference. You can participate in the Management Quota rounds of States like Kerala, Tamilnadu and Karnataka from South India. But with this score, a seat might be tad difficult. 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