Hello aspirant.

For appearing Neet you must have passed class xii in all the subjects .

You should reappear for chemistry exam , get it passed and then you can apply for neet otherwise your application will be rejected.

You can appear for the exam from any  Open university like NIOS .

NIOS marks are accepted in neet.

As per eligibility criteria for neet, the candidate must be 17 years old.

The candidate must have passed class xii with physics ,chemistry and biology with minimum 50% marks . English is mandatory subject.


You may visit the link given below
https://medicine.careers360.com/articles/neet-eligibility-criteria