Explanation:

Here’s the thing—‘Operation Sajag’ was actually launched in Delhi, not anywhere else. Let’s break down the options:

- Haryana: Not connected to Operation Sajag in 2021. Haryana’s police have had drives, but this wasn’t one of them.

- Delhi: Correct answer. In October 2021, Delhi Police started Operation Sajag. The idea? To increase police visibility, check suspicious vehicles, and keep crimes like burglary and snatching under control.

- Uttar Pradesh: They run major operations, but not this one. They’ve focused more on anti-crime campaigns with different names.

- Bihar: Not related to Operation Sajag at the time. Their police were busy with other initiatives.

So Delhi is definitely the right answer here.