Greetings, aspirant!

There can be no 'one best career option.' It's all about what you're passionate about. All of the fields you're interested in are excellent fields in which one can make a career. However, you cannot judge a field and find out whether it's akin to your liking or not in one day.

I suggest you take some aptitude tests and find out more about what you like. The fields you've mentioned above lead to very different career paths down the road. Although it's not impossible to change your career path if you're not content with it, finding your interests and making a career in it firsthand is always a better choice.

As for the scope in the fields you've mentioned, there'll always be a need for advocates, engineers, bankers and Defence forces. So you need not worry sbout that.

Hope this information helps you

Best of luck!!