Hey Arunima !
We all have heard about this year's Rank Inflation. Almost everyone has been affected.
Had your score of 497 been in NEET 2018, you could have easily got a seat in a Govt. Medical College but as far this year's Rank vs Marks is concerned, I would say your chances are quite bleak.
Let me tell you that in 2018, the last UR Category student to get in through the gates of a Govt. Medical College in the state of West Bengal had a rank of about 29k. And looking at your score, I can predict about your rank to be approximately 53k.

That is a total gap of around 24k All India Ranks.
Its really tough to get in through this year friend.
Either way, you can go through the cutoff of 2018 following the below mentioned link :
https://www.google.com/amp/s/medicine.careers360.com/articles/neet-cutoff-west-bengal/amp
All the Best !

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