CBSE 12th

Yes, you can but you should be qualified in EAMCET.

Candidates who have completed their 10 + 2 examination with Physics, Chemistryand Mathematics or 10+ 3 Diploma with Mathematics as subject of study canappear for NATA 2023. Candidates appearing for 10+2 examination with Physics, Chemistry and Mathematics as subjects of study or 10+3 Diploma with Mathematicsin the current year may also provisionally appear for NATA-2023.Candidates may note that NATA 2023 is the qualifier for admission to B.Arch.program offered by Universities/ Institutions in the country, subject to the fulfillmentof eligibility criteria as prescribed by the Council. 

Yes, you are eligible to take admission to Architecture course with 87 in NATA and 74.2% in 12th (hopefully PCM average is above 50%).

Visit the official website of GSEB- gseb.orgClick on GSEB Result link provided on the homepage of the websiteEnter the seat numberSubmit detailsThe GSEB Result will be displayed on the screenSave your GESB SSC/HSC Result for immediate references

Yes, you have to clear all your exams. Then after you take admission in college. Because when you fill the form they want marksheet for proof. So you have to clear your all exams