Hello Aspirant,
See the fields you have mentioned are completely different from each other. If you do diploma in Ethical Hacking then you will have various options to explore in Cyber world/space like Hacking, protection of systems from Hackers, working as an ethical hacker for different companies, you can work for government agencies such as CBI, NIA, IB and so on (for this you need some extra authorizations) and many other options.
If you got through diploma in Business analytics then it will going to take you for the role of Business analyst, data researcher, management consultant and so on means for this field you can go only in private sector companies.
Note that in Ethical hacking field you have career opportunities in private sector as well as public/government sector but in Business Analytics you have opportunities only in private sector.
So both field are good in their perspective but you have to choose according to your interest. If you have interest in ethical hacking/programming then I would suggest you to go with first option otherwise second option will be good one for you.
I hope this information helps you.
Good Luck!!
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