Hi aspirant,

With 343 Mark you have no chance to get government mbbs seat if you belong to OBC catagory. You need to score at least 410 above marks for government seat. But you can easily get private mbbs seat or you can get seat in government BDS college.

This information is based on previous years cutoff and the cutoff marks change every year. It's depends upon number of students that appeared in examination, number of seats available in colleges, difficulties of question paper,etc.

You can use neet college predictor to know which college you may get with your marks. That is mentioned below:-
https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer