Hi there,

As per the latest updates, for a candidate to become eligible to write NEET he/she has to have a score of 50% aggregate (for general category) in subjects of Physics, Chemistry and biology. 

The candidate must have also passed in each subject specifically. 

Hence your son is not eligible for writing NEET. For more relevant information, please check the link given below: 

https://www.google.co.in/amp/s/medicine.careers360.com/articles/neet-eligibility-criteria/amp

Wishing you luck!