JEE Main

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.

GATE Exam is not looking for any syllabus completion from the candidate. A good understanding of the basic concepts and their application is required. By understanding, it is implied that candidate is not supposed to just be able to mug up & explain but rather this exam needs candidate to have a feel/common sense.

Your rank is little bit high. As you belong to OBC category, you must score more than 45, like 90 above in order to get a seat in NIT or IIIT. I am providing you the link, please check that you will get which NIT or IIIT on basis of your rank.
If your marks are 85 or 90 above, then you will get the college. But, if it is lower, then there is very less chance of getting the college. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
For any further query please feel free to ask.

Yes you can apply for B.Arch.

With this marks, you can't get a good college at all. You can only get any private college, which will take you a large amount of money. You can try in any college who only give admission on the basis of their entrance exam. You can try to get admission there. Good luck.

One can have a maximum of 3 attempts at JEE Mains. One attempt can be made along with your class 12th board exams. And, the rest in next two consecutive years.

Hello Akash,
Your performance is not up to the mark in both JEE Mains and boards so think once again do you really want to do engineering, if yes then take a gap and prepare well for next year.
All the best.

The cutoff is just 45, and you got 51 marks. The difference is very little. There is less chance of getting a college, like NIT. But, I am not sure. You can use the link I have given below
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
If you have any further query, please feel free to ask.

Hello,
I hope you are doing well. You can check the list of colleges including NITs and IIITs that you can get according to your marks and rank here. Use Shiksha JEE College Predictor:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7489993.