Explanation:

- Option 1: Himachal Pradesh

- Himachal Pradesh is a neighboring state of Punjab. However, Bhagwant Mann did not become the Chief Minister here.

- Option 2: Haryana

- Haryana also borders Punjab. Bhagwant Mann has not held the Chief Minister position in this state.

- Option 3: Punjab

- Correct Answer: Bhagwant Mann became the Chief Minister of Punjab in March 2022.

- He is a member of the Aam Aadmi Party (AAP), which won the state assembly elections.

- Option 4: Delhi

- Delhi is a union territory with a separate political structure. Arvind Kejriwal is the Chief Minister associated with the AAP here.