If you have completed your 12th with biology background, you have a wide range of options for undergraduate courses.

Here are some popular options:

1. MBBS/ BDS
2. Biotechnology/ Biochemistry/ Microbiology
3. B.Pharma
4. B.Sc Nursing
5. Agricultural Sciences
6. Zoology/ Botany/ Environmental Science
7. Paramedical Courses ( physiotherapy, occupational therapy etc).

Click on the below link to know more about the courses to choose for graduate after your 12th grade.

https://school.careers360.com/articles/courses-after-12th-in-biology