Hi Nithish,
If you wish to earn easy money you should go for CSE or ECE. If you have an interest in Physics you can go for Mechanical or Electrical. Or Chemical if you have more interest in Chemistry. However, with the marks you have got, you can easily get a Bachelor's from top colleges like DU, JU or Presidency in Physics, Mathematics etc. There are a lot of scholarships available for the science students. After graduation, you can then join HRI or TIFR upon which you will not only get a hefty scholarship, but also a chance to study under the topmost scientists and scholars of the world. You will easily get an opportunity to go abroad at topmost research institutes like the Geneva centre.
Good Luck:)
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