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I am surprised. Why do you wish to go to automobile engineering suddenly being a commerce student?
As far as eligibility is concerned, commerce student is not eligible for engineering or other science based courses anywhere.
If you wish to leave commerce stream altogether and you are thinking and sure that automobile engineering is what you wish to do, then you can go for a Diploma in Automobile Engineering from a local Polytechnic college. Later is highly recommended that you complete your graduation in automobile engineering for good and long term career opportunities.
Marine Engineering is a good career option. Hope you have chose this engineering wisely and after a due diligence of your capability, aptitude and interest.
There are few good colleges in India for Marine Engineering:
Tolani Maritime Institute (TMI), Pune
Maharashtra Academy of Naval Education & Training (MANET), Pune
Vels Academy of Maritime Studies, Chennai
Marine Engineering and Research Institute (MERI), Kolkata
Chennai School of Ship Management (CSSM), Tamil Nadu
College Of Engineering (Andhra University), Visakhapatnam
Mohamed Sathak Engineering College (MSEC), Kilaka