Hi student, 

Now in case of NATA ther are some regulations. Your boards percentage is good but you know to get admission in Govt college you have to get the best marks

Now in case of NATA evaluation  your NATA score out of 200 will be converted into marks out of 100 and your 12th marks will be added to it which will give you your Final Merit score.

More over anything above 130 will get you into a very good college (Private) and a score above 150 is required if you want admission in a government college. Anything between 100 and 130 will get you into a decent college and if your score is below 100 then it might be a little difficult to get into a college of your choice. 

Now as you have your board score above 90 % so there is a chance to get in a good college, so you can try.  

Best Of Luck....