Dear,

Nowadays, engg admission is not only based on 12th marks whereas also the marks scored in various entrance exams like JEE, CET etc. are important. Many colleges take admission only on the marks scored in these entrance exams. If you want admission on the basis of your 12th mks then bsc is an option. Also, management quota is an option but they charge high fees depending on the college and the course. Feel free to ask further queries also I would say to specify the region you looking a college in.

Hope this helps!