Explanation:

Let’s break it down:

- Option 1: Sujlam

This was the first phase, kicked off earlier for greywater management. It’s all about treating and reusing household wastewater, especially in rural areas.

- Option 2: Sujlam 2.0

Here's the thing—this is the campaign that actually launched in March 2022. Sujlam 2.0 built on the original, ramping up activities to treat and reuse greywater, aiming for better sustainability.

- Option 3: Jalrakshak

Doesn’t relate specifically to the March 2022 launch or greywater. If you see this pop up, put a pin in it—it's not the one.

- Option 4: Jalrakshak 2.0

Like the last one, not connected to this campaign or timeline.

So, bottom line:

Option 2: Sujlam 2.0 is the right answer. That’s the campaign kicked off in March 2022 to manage greywater.