dear aspirant,hope you are doing well.now coming to  your question,as per the previous year cutoff rank for getting admission into any government college through Mop-Up round for west bengal domicile students went from 1000-1300 rank at a max.(if considering general student).I think your rank is very close to get BDS seat.So i would advise you to look for some colleges parallely to create a backup.

hope this will help.