Hello,

Yes, you can take up Biology subject through NIOS and pass in it in order to be eligible to appear for NEET even if you are pursuing B.E. To be eligible for NEET UG you must have passed 10+2 with Biology/Bio-Technology, Physics, Chemistry and English. If you belong to general category you must score minimum 50% aggregate marks in Biology/Bio-Technology, Physics and Chemistry taken together including theory and practical examination, if you belong to SC/ST/OBC category then you must score minimum 40% aggregate marks in Biology/Bio-Technology, Physics and Chemistry taken together including theory and practical examination and if you belong to PWD category you must have scored minimum 45% aggregate marks in Biology/Bio-Technology, Physics and Chemistry taken together including theory and practical examination.

For more details click on the link below

https://medicine.careers360.com/articles/neet-eligibility-criteria