Hi Narayan,

As you mentioned that your son is currently in 1st year of 3 years bachelor's degree in which physics is a core subject. So, according to the norms, he can apply for NEET Code 05 if he appears fro NEET after qualifying his first year. Your son need to verified that he has qualified first year university level exam and has also qualified 10+2 exam. For more information, visit here:

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

Thankyou!