Hello ashisheeeeee , From some research on internet I found that IIT Delhi is one of best option for Mechanical engineering because it has good placement with approx. 15-20 lakh per annum and it is enough as a fresher. And if we talk about scope of mechanical engineering then it is also a wide range of fields in which Mechanical engineers work and the job opportunities are also increased by 9-10% in upcoming 5 years.

Hope it will be helpful for you :)