Dear Aspirant,
NEETPG is the basis on which all admissions are done and the total marks is out of 1200. Hence to be safe we can assume a score of 500-550 for the good colleges and lessor scores for the other colleges.
What you need to do is short list the colleges you intend to apply to and find out the expected cut off for them and then narrow your choices based on your rank/marks. The indicated marks are just a guideline and it can change based on the college you intend to apply and the number of candidates and the specific course you intend to apply for. A discussion with any of the colleges you intend to apply will firm up your options.
Good Luck
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