Hello Shubhra
Biology basically opens to you wide array of career options which you can avail after class 12
Starting from the most ambitious LINE which is MBBS and BDS which you can avail through the Neet examination, a number of other paramedical lines are also open in front of you
The include the career in a veterinary medicine which can also be cleared through Neet
There are separate entrance examination for BSC nursing and Bachelor of Physiotherapy that is BPT courses
You can also opt for alternative medicine or homeopathic BHMS courses
You can also off for a DMLT course on lab assistant ship to be heading in paramedical Sciences of Biochemistry, microbiology and Pathology Laboratory work
Can also up for pharmacy in the form of B pharm courses and be an advisor in medicine producing and other related companies
Of course a number of general science is in the form of physics, chemistry, botany zoology physiology, psychology comma microbiology and Biotechnology are open in front of you and you can pursue bachelor, Masters and doctor degree in them and take up professorship of the entrepreneurship in some bio- technological companies which are viable career options at your level
Hope these suggestions help you thank you

Join biotechnology
GOOD LUCK