After 12th there are many options you can opt, It depends on your interest & capability. If you are a PCB student then you can go for MBBS, BDS & other Ayush programme. Some other options you can opt:

Bachelor of Science in specializations under the pure sciences domain such as Chemistry, Botany, Zoology etc.

The other options you can opt if you are interested for Management, Commerce or Law programme then you can go for BBA, B.com, B.A LLB etc.

All the options are good & has the scope in its field. It totally depends on your interest.

Good Luck!