In IET Lucknow if I want to prepare for civil services..will I opt for off campus PG near it and its criteria?

To prepare for any Civil Services Examination, you will have to take a PG apartment. Make sure that the environment around the PG is very quiet and there are no noises around. This will help you in concentrating on your studies. 

The campus hostels are also good. Every year many students qualify for CAT, GATE, IES, and many other competitive examinations. But off-campus PG will be more preferable for you.

You can take your graduation subject like Civil or Mechanical Engineering as your optional subject in the Civil Service examinations. These branches have good faculty members. 

If you want to take non-engineering subjects branches to prepare, you can go for CS/IT branches. These branches have few classes and you can get ample time for preparations. The placements in these branches are also good. The college curriculum is not very hectic and you can easily continue your preparation.