Hello Selina, Obviously, getting into any college regardless of the stream requires you to be a 12th pass out and they require your 12th marks card in order to get admission in engineering colleges. You can't take admission in any of the colleges without 12th marks. It's the basic criteria for admission. You generally need to score around 50% if you are going to no GFTIs and about 75% if you are selecting NITs, IIITs or IITs.

Hi there.
Yes your 12 marks are required for engineering admission.
For eligibility you need 50% at least in PCM . After that you need good marks in competitive exams like JEE MAINS AND CET . Considering all the marks , you will have to apply according to your rank and score .
Then you will get admission in the college you want , according to the score you scored.
Hope this was helpful