Hello

The official website also mentions that the eligibility for Jamia entrance exam is graduation in any discipline with more than 55% marks. So I don't think it will be a problem if you've done B Tech as long as you got more than 55% marks.

But still it is explicitly mentioned that '3 years of Bachelors' is required, so I think you shouldn't take any chance and confirm it from the university itself before going any forward or maybe from a senior who has experienced the same.

Hope this helps you.