Hello Ayush,

as you got good rank in Indian maritime university you can join in any campuses shown below

1 Kochi

2 Kolkata

3 Visakhapatnam 

4 Mumbai

5 navi Mumbai

5 Chennai

and also it offers b.tech in marine engineering and naval architecture and ocean engineering

and also it offers BBA bse and, Diploma

choosing of course, it depends on you.

I suggest you to take engineering. because engineering has a great scope in future