Hii aspirant,

You got nta percentile score 39.05 & your cbse marks is 81.2. You asked if you may get a good b arch college or not.

Now, look, your percentile score in jee main paper 2 is not so good. For jee paper 2 , the rank calculation process is,

[100-your percentile] x (total no. of candidates)/100. Therefore, approximately your rank will be around 58k to 60k. This rank is poor. You have less chances to get a seat in B. Arch.

All the best  !!