B.Tech Scope

Hello Chitransh,
The link below gives you the list of top colleges in Lucknow for B.Tech in CSE:
https://www.shiksha.com/b-tech/colleges/b-tech-in-computer-science-engineering-colleges-lucknow

Dear,
That is dependent on person to person if you have leadership qualities, people management and have idea and want to convert into business module.
But before entering into entrepreneurship you must have job experience.

There are pool campus placements, you could try for them.
Take part in hackatons or any competitions, usually few companies directly recruit through those.

It all depends on your technical skills. Yes, of course your college will matter a lot. So, try to get into whatever good college possible for your score. Because the task gets much easier if you are in a reputed college or you will have to do a lot of hard work to reach to the same point.