sir my expected marks in neet is 450 and in belongs to UR candidate what i am getting govt seat at this from this marks

Yes you could get a Government Medical College sleep but that would not be in a decent college possibly since most of the government medical college seats available the 85% state quota will be given to people who usually score and excess of 462 470 and they were revealing it by the 15% all India quota then definitely The Marks would be in excess of 550
You can hope for some good private medical college seat awesome Government Medical College seat using the state quota but one of the inferior government medical colleges in your state maybe