Hello Aspirant !
The eligibility criteria issued by NATA for giving admissions in B.Arch specializion , are that if you are giving qualifying exams of 12th or 10 +3 i.e Diploma , then you are eligible for appearing in the entrance exam , only you must pass your qualifying examination and submit proof regarding the same during the time of admission.
Hence , you are eligible for appearing in the entrance exam.
You can check more information on our site :
Hope it helps !