To study MBBS in Nepal, you should score a minimum 40 percentile of the top NEET score. That is the minimum qualifying percentile for qualifying in NEET. You need to just score the qualifying marks in NEET against your Category to be eligible for studying MBBS in a foreign country. Now the formula is 50 percentile of the top NEET score for General Category and 40% percentile for OBC,SC,ST. This is the general formula for calculating the cut off. Last year it was 107-133 for OBC Category. Again this is 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. You will need to score atleast 150-175 to qualify in NEET under OBC Category. This is just an assumption.