Explanation:

- The Mahatma Gandhi National Rural Employment Guarantee Scheme (MGNREGS) is an Indian government initiative to enhance livelihood security in rural areas.

- In March 2022, the Government of India revised wage rates for this scheme across many states.

- Option 1: Assam

- Correct. Assam is one of the states where wage rates were revised under MGNREGS.

-

- Option 2: Mizoram

- Also experienced wage revisions but not the focus of this specific query.

- Option 3: Manipur

- Also possibly included but not highlighted specifically in options mentioned.

- Option 4: Tripura

- Like other Northeast states, it can be assumed to have had revisions too.