iam a dropper student of telanagana board i kept code 2 will there be any problem if i keep code 2?

You should have chosen the code 3 as you are a telangan board student. This is because Telengana board offers intermediate. So having code 2 as a code didn't conclude your case. Also you are a dropper so code 2 isn't completely wrong. Also the code 2 is applicable for all state boards as well as cbse/icse. So hopefully you have nothing to worry about.

Code 3 is applicable for those passed their intermediate / pre- degree examination or pre university (  PUC)  in the year  with physics, chemistry, biology and English ,your physics, chemistry and biology should also contain practical exam. But as you are a topper its not probable to cause any problem.

To know more about NEET codes visit the link below:

https://medicine.careers360.com/articles/neet-qualification-codes

For NEET revision strategy visit the link below:

https://medicine.careers360.com/articles/revision-strategy-for-neet

I hope this answer helps. All the very best for your future endeavors!