The district which does not share boundary with other states is :

Question

Accepted Answer

Option 2, Rohtak, is the correct answer because it is a district in the state of Haryana, India, that does not share its boundary with any other state. Rohtak is centrally located within Haryana and is surrounded by other districts of the same state, such as Sonipat, Jhajjar, and Bhiwani. This geographical positioning ensures that Rohtak is entirely enclosed by districts within Haryana, thus not sharing a boundary with any neighboring state.

Now, let's examine why the other options are incorrect:

1. **Panipat**: This district is located in the northern part of Haryana and shares its boundary with the state of Uttar Pradesh. The Yamuna River forms a natural boundary between Panipat and Uttar Pradesh, making it incorrect as it does share a boundary with another state.

3. **Rewari**: Situated in the southern part of Haryana, Rewari shares its boundary with the state of Rajasthan. This makes it incorrect for the question, as it does have a state boundary.

4. **Palwal**: This district is located in the southeastern part of Haryana and shares its boundary with the state of Uttar Pradesh. The proximity to the state border disqualifies it from being the correct answer.

In conclusion, Rohtak is the only district among the given options that does not share a boundary with any other state, making Option 2 the correct answer.