Hello,

There are several courses you can join after 12th

1. Biology :-

Courses after 12th offered through entrance exam

Bachelor of Medicine, Bachelor of Surgery ( MBBS) , Bachelor of Dental Surgery (BDS) , Bachelor of Ayurvedic Medicine and Surgery (BAMS) , Bachelor of Homeopathic Medicine and Surgery (BHMS) ,  Bachelor of Unani Medicine and Surgery (BUMS) ,  Bachelor of Physiotherapy (B.Pth or BPT) ,   Bachelor of Veterinary Science (B.VSc) ,  Bachelor of Naturopathy and Yoga (BNYS).

Courses after 12th without entrance exam

Bachelor of Occupational Therapy , Bachelor of Science in Biotechnology , Bachelor of Technology (B.Tech) in Biomedical Engineering , Bachelor of Science in Microbiology (Non-Clinical) , Bachelor of Science in Cardiac or Cardiovascular Technology , Bachelor of Respiratory Therapy , Bachelor in Psychology etc.

2. Chemistry :-

• B.Sc :- B.Sc (Analytical methods in Chemistry and Biochemistry) , B.Sc (Applied Chemistry) , B.Sc (H) Chemistry , B.Sc (Industrial Chemistry).

• B.Tech :- B.Tech in Pharmaceutical Chemistry and Technology , B.Tech in Chemical Engineering , B.Tech Textile Chemistry , B.Tech in Petroleum , Biotechnology and Biochemical Engineering.

• Bachelor of Science (BS) :- Bachelor of Science (Chemistry 4 years)

• B.Pharmacy :- B.Pharmacy

3. Nutrition :- Dietitian , Nutritionist

for more information you can check out the links given below

1.) Biology

https://medicine.careers360.com/articles/medical-courses-after-12th

2.) Chemistry

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

3.) Nutrition

https://www.careers360.com/articles/4880-Career-review-nutrition-and-dietetics

Hope this answer is beneficial to you

Good luck