Mechanical Engineering

Yes, it has wide opportunities.

Hello Roshan,
Even though mechanical engineering appears to be the first choice. The total number of students, who graduated in mechanical engineering is good, while only handful passes out as aeronautical engineers. In India, a large number of companies will require this specialization. Hence, if opportunities appear to be a bit less at the moment, future holds a great potential for this discipline in India.
I hope it helps. If you have any further questions, kindly revert.

Hello Aman Gupta,
Yes, its a good option but it will be better if you do your 12th and then B.Tech engineering because in many courses. They ask for 12th as an eligibility criteria.

PCM with 60% from any board. Also, college criteria for choosing like JEE Mains, etc.

Yes, you can do B.Tech by taking lateral entry in 2nd year after diploma in mechanical engineering.

Yes, after completing your Diploma, you can pursue BE in IIT or NIT. You can apply through lateral entry and get direct admission in 2nd year. You will have to fill the form for lateral entry and appear for an entrance exam.

Hello Sunil,
With a diploma alone, it will be difficult but there is no harm trying. Entry level jobs will be available. A higher qualification is important. Try for applying to Bachelor degree programs and then apply.