Hello aspirant! Hope you are doing great.

So with regard to your query, if you have biology as an additional subject in your 12th standard. Your code will be 2. i.e., code 2 while filling up your application form for NEET (UG) 2022

As per NEET eligibility criteria, one must pass 12th standard with physics, chemistry, Biology and English as core subjects. However, additional subjects are also allowed in regard to a particular code.

You can check the following link in regard to the code-

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

Hope it helps you,

Good luck!