what to do after mechanical engineering??mba or m.tech or in merchant navy?? and which one have better scope??

I think you should go with engineering ..(m.tech) as per my suggestion..rest depends on your interest.

Merchant Navy is a good option provided you are not very much sentimental in nature and can afford to live alone for days together. It has huge money and longer holidays. M.Tech would be good provided you want to be in the education line and in that case you need to do something more also. MBA is th

if you are academically strong go ahead with masters, if you have flair for management pursue MBA, in case of a different life style and good money join navy