Class 12-science

There are many options for Science students after class 1th :
You can prepare for IIT or UPTU
Merchant Navy
NDA, SSC
B.Sc in physics, Chemistry or Maths
B.Sc in Agriculture
BBA, if you are interested in business
B.Tech petroleum
Law
B.Ed
B.Sc forestry
And, many other.

After completion of 12th in science. One should give entrance exams for top engineering college like IIT NIT, VIT, SRM, KIIT, IPU, LPU, etc. There are so many entrance exams conducted and those are JEE Mains, JEE Advanced SRMJEE, VITEEE, KIITEE, Sathyabama University, IPU, LPU-NEST, etc. One should opt to give these exams.

B.Sc Stats
B.Sc maths
BBA
BCA
B.Sc physics
Engineering
Marine courses

You can go for B.Sc or switch your course. Try for BBA or BCA.

There are many courses available for you after PCB:
MBBS
BAMS
BHMS
BUMS
Bachelor of Physiotherapy
Bachelor of Veterinary Science and animal husbandry
Bachelor of neuropathy and Yogic Science
B.Sc nursing
B.Sc Agriculture
Pharmacy
Biotechnology
General nursing
B.Ed
B.Sc degree.

After 12th in science with physics, chemistry and maths as main subjects, engineering is one of the popular fields to choose. There are ample opportunities after engineering in Private and Public sector. IT industries recruits a lot of engineers every year. Entrance exams conducted by PSUs for graduate students. Another option is Bachelors in Science, people keen to study in-depth about one subject, than its a better option. Research-oriented students can go for B.Sc and then M.Sc followed by Ph.D later.

You can repeat your one year with maths as a subject. You can give the exam of maths next year. You only need to give a single exam of maths. For the same year, it is not possible.
Thank you.

If you have an inclination for technology, you can definitely pursue engineering courses. Maths ability is a must for success in engineering. If you do not like engineering, you can opt for commerce stream, which offers much wider job options such as CA, CS, CFA, etc. There are other options such as BBA, B.Sc. in hotel management, law, etc. which offer substantially higher job opportunities. However, it all depends on your taste, preference and target. Best of luck.

IP is not a bad subject. You get Knowledge about Java programming, database management, interface, coding. After 12th, you can go for BCA /MCA or BCA/MBA combination so you get the job. As we all know that how the technical field scope is rising day by day in this era. So, you just do your IP calmly. Don't worry. And best of luck.

You can go for B.Tech or B.Sc. Otherwise you go for some professional course from your field of interest.