Yes, B.Sc. CBZ (Chemistry, Botany, Zoology) is available in Marathi medium in some colleges in Maharashtra. Some colleges like Ruia College in Mumba i and colleges under Savitribai Phule Pune University (like those in Pune, Ahmednagar, Parner, etc.) offer this course where teachers teach in Marathi and students can write exams in Marathi too. Before taking admission, just check with the college if they offer the course in Marathi, and if Marathi is used in teaching and exams. You can do this by calling them or checking their website or prospectus.