JEE Advanced

Hello Anand,
For getting admission into any NITs, your JEE Mains marks are considered not your JEE Advanced score.
All the best.

Hello Sandeep,
If you want to take admission into any IITs, then only you have to give JEE Advanced. Otherwise, skip it, its absolutely fine.
All the best.

Your marks should be 200 and above.

Yes, you are definitely eligible for JEE Advance 2019 because they accept the marks of NIOS board also and your 12th score is also good. Best of luck for your future and if there's any query, feel free to ask.

I'm an ex-Allen student. All the IIT-JEE coaching institutes of kotak focuses on IIT Advance and not on IIT Mains. IIT Mains is completely based on NCERT material and CBSE makes the question paper whereas IIT Adv. Syllabus is very different and Ex IIT faculty makes the question paper.

Hello Aaditya,
For getting into IITs, you need a valid JEE Advanced score only, JEE Mains scores are not accepted.

There is no such kind of process. You have to reappear next year for JEE Mains in order to be eligible for JEE Advanced. However, if you get good marks in JEE Mains, only on your respective category, then also you can get the college. But, if you want to get admission in IIT only, then you have to qualify with good marks in JEE Advanced.

According to the selection ratio, Allen-Kota is a better option.

Yes, but instead of study at home I would recommend you to join some good institutions that gives coaching classes of JEE exams. This will help you learning more and in a better way and you will definitely clear the exams if you study by heart.

Yeah you can Surely prepare for Jee Advanced with those but after you have cleared the cutoff.
You can also checkout the list of college offered under these Ranks
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=cconnect&utm_medium=CR_JEECP&utm_campaign=7476690
Hope this Helps !
Best Of Luck!