Biology Eligibility

No, a non-biology stream student cannot do Veterinary Science courses.
Most courses in Veterinary Science require a good background in Biology, which students coming from non-biology streams may not possess. These programs in Veterinary Science are science-intensive and need due qualification in Biology or allied subjects to fulfill the requirements of admission.

Yes, you can take only the biology subject exam from NIOS and still qualify for NEET if you're a maths student. NEET is open to NIOS students who meet the qualifying requirements, including passing the Class XII exam with Biology as a subject and meeting all other requirements. In order to be eligible for NEET, candidates must pass the qualifying test in each of the following subjects: English, physics, chemistry, biology/biotechnology, and biology. This means that even if you are a maths student pursuing biology at NIOS, you can still apply for NEET.