CBSE 12th

Hi,
Rather than the best, I would focus on the more popular options. Best could vary from person to person and will depend on one's skill set.
Biotechnology
Bioinformatics
MBBS
Biology
Genetic Engineering
Biomedical Engineering
Health Sciences
Physiotherapy
Pharmacy
and many more.

Yes, you are eligible to study B.Com. But, somewhere you'll get problems about basics of commerce as it I cleared in +1and +2. But, if you give some extra time and put enough efforts then it'll be easier for you.
Good luck.

Hi,
Please define ' good career'. Your answer will depend on the kind of 'career' you want to be in. There could be numerous options depending on your education background. Most importantly, you need to know your own interests and areas of strengths. Since your query is incomplete without any mention of your academic details, it will be hard to counsel.

Hi,
Every college has its specific process and merit list. You have to keep checking the websites for notifications. Earn a degree in management, you may specialize in sales. For better prospects further, pursue a PGDM in sales or pursue an MBA.

Hi,
Numerous options are available and will depend on your education background. Kindly specify your stream.

Wait for your results to come. And according to your scores, it can be decided whether you can get the admission in the respective course and university.
Good luck.

Hi,
Earn a Bachelor's degree in software engineering and excel in your academics and skills. Opt for Master's degree for better prospects. Remember, only holding a degree won't suffice, your skills are most important.

Kindly mention your field of interest.

Hi,
Kindly mention your stream. Are you from arts, science or commerce? Also, mention the subjects in which you are interested.