Hello aspirant

hope you are doing well and safe. With reference to your query,  I would glad inform you that  we should talk about speciifc stuff , so to be eligible for btech you need to be passed out in 12th with Physics ,chemistry ,maths and ncert syllabus has followed in all subjects and if we talk about cbse ,then cbse board students who have pcm in 12th are eligible to do btech from recgonized university

Hope you found this answer informative. Best wishes for your future