what i have do after my 12th if i want to do doctrine?

Hi Devasri. You must complete with your degree and masters for engineering. Once you have completed the same. You must do M.Phil and then PhD.Write the entrance exam to get a good engineering college of your choice all the best. All the best. Regards Gijoo

The track to be followed after +2 is graduation in same/similar disciplines, Post graduation , the PhD You may have to clear examinations as applicable and prescribed by various Universities. Integrated PhD is another option, but after a graduation.