JEE Main Application Form

You can mention OBC category. If you have OBC certification, trying out during counseling.

Please refer to the link provided below for a detailed list of colleges which offers B.Arch courses in India. You should be able to navigate to a college of your choice using the filters on the web page. Additionally, download their brochure for further details.
Regards.
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india

Shubhi, you can't do anything related to it but only give the paper-2 now, since you have paid for just one exam.

Yes, there is a facility for correcting the form. You can visit the website and follow the link. JEE Mains 2018 form correction window will be available from fourth week of January to first week of February. This is tentative, so please visit the website every day. However, those who have paid the fees and completed all the steps of the form filling, will be allowed for correcting the form.

Hello Ayush,
No, unfortunately, no. You will have to appear once again in 2018 for JEE Mains.

Hello Yashwant,
You need not worry about this, you can correct it at the time of counselling by showing the correct mark-sheet, however it will be better for you to talk to the CBSE officials once they can guide you better regarding this.

Yes, you need to update your URN as a proof for any type of correction in the form.

UP board is a recognised board of education. Students who are appearing for UP board 12th class examination are eligible to appear for JEE Mains.

Yes, you can get admission for B.Tech in colleges other than IITs, NITs, etc.