You have same interest in both Computer Science and Engineering and Mechanical engineering then you should definitely choose Computer Science and Engineering because it will offer you get placement opportunities and you will definitely get job just after completing your graduation if you go for mechanical engineering then the opportunities are less and competition is hi there for you should choose Computer Science and Engineering.

Hi Kaushik,
In my point of view you can choose CS because it is the only field which requires more job vacancies and it is a fact that most of the core students will fall on IT related jobs. It is wise to choose CS than anyother course. All the best.