420 marks in quite an average marks in Neet. You know that the cutoffs change every year so it is quite difficult to predict. Now if we go through the last year's cutoffs, then you can expect colleges like Vedantaa Institute of Medical Science Vedantaa Hospital and Research Center, Palghar etc. You can check the cutoffs here https://medicine.careers360.com/articles/neet-cutoff-maharashtra But you have fair chances of getting a seat in BDS. But keep in mind that these are last year's cutoffs and this year it might change. So I would suggest you to use Neet College Predictor tool to know where you have good chances https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer