Yes, if your father is in Paramilitary Force, you can apply for Central Pool Quota.

Now coming to your marks - it is difficult to get a Government Medical Seat (MBBS and BDS) with a score of 457 via 15% All India Quota (as in 2020, cut off for General Category in a Govt Medical College was 611/720) However you can get a Private Seat with your score. You can copy paste the f ollowing link (official link of MCC ) to see the list of all Candidates Allotted in MBBS and BDS Seats via MCC Counselling in 2020 so as to get an idea of overall Cut Offs and Closing Ranks for different colleges - https://mcc.nic.in/WebinfoUG/File/ViewFile?FileId=2&LangId=P (Copy paste the link in the web browser)

Alternatively, you can predict what all colleges you can get with your rank by using the NEET UG College Predictor - NEET College Predictor 2021 - Predict Colleges based on your Rank (careers360.com)

Also, from your profile, it seems you are an aspirant from UP. In 2020, cut off score in UP Govt Medical College (via 85% State Quota) for General Category was 612/720. You can check the detailed cut offs of all medical and dental colleges (85% State Quota) of UP from this link - NEET 2021 Cutoff UP - Uttar Pradesh NEET MBBS BDS Cutoffs (careers360.com)