Hi

After 12 science a girl has all the options as that of a boy, a variety of courses are there that you can go for after your 12th science but you didn't mention whether you have pcm or PCB in your 12th science.

Nevertheless, if you are from science stream with biology in your 10+2 then following are the top courses you can go for depending upon your interest :-

MBBS.
BDS
BAMS
BHMS
Bsc Nursing
Bachelor of Veterinary Science & Animal Husbandry
Bachelor of Naturopathy & Yogic Science (BNYS)
Bachelor of Physiotherapy.
Paramedical courses
BSc dairy technology
BSc biotechnology
BMLT i.e bachelor in medical lab technology
Bioengineering
Bsc agriculture

If you are from science stream with maths , then you can go for following courses :-

BTECH
B.Arch
Integrated M.Sc
BCA
BBA
B.Sc. Degree
B.Des

You can use any of the above courses depending upon your interest

Thankyou