HELLO Kiran,
I am bit confused that the courses you have mentiond are completey different from each other. As enigneering is realted to some technology knowledge on the contrary CA i.e. charted accountant is something very different as it is mainly related to accounts. On the other hand merchant navy is very much responsible and honored job. So it is complety based on your personal choice which makes you more encited then only you can decide one of them. All the best fo your future.
Hope you like my answer.
THANK YOU.
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