Hi student,

Taking maths as the additional  subject certainly gives you the chance to appear for the engineering entrance examination.

Yes, if you clear the jee advanced examination with a good score and rank, then certainly you can get admission in the top iits without any hindrance.

But at present your focus should be on the studies and not on the future aspects and when the time comes you must clear the examination with a good rank and then no one can stop from securing a admission in the top iits.

Thus, currently work hard and focus on studies to prepare for the upcoming examinations and get admission in your favourite institutes.

hope this resolves your query.