Hello dear,
After 12th with there is lots of options..
. BE/B-Tech
Bachelor of Technology-As I recommend BE/B-Tech is the ideal option for any 12th class student of science. For pursuing B-Tech one have to give the joint entrance exam (JEE-Main) and if someone wants to take admission in IIT then he need to qualify its condition that you must be in top 150000 students of JEE-Main. After that you need to do four year degree from various Institute according to your Rank.
2. BSC (Non-med, electronics, IT)- Various courses after 12th science in india
Bachelor of science- These are the traditional degrees and there are many Universities which do not take any entrance test for it. Your admission will be done according to your percentage of 12th class. Students who want to be a scientist then I suggest that it is the best degree for them.
3. BCA- Various courses after 12th science in india
Bachelor of Computer application- It is for those who want to do Bachelor degree in computer field. There are many Universities which do not take any entrance test for it. Your admission will be done according to your percentage of 12th class. The only condition is that you must have math if you are from arts side.
All The very Best..