The correct answer is option 2, Chhattisgarh. Chhattisgarh is a state located in central India and it does not share an international boundary with any other country. An international boundary refers to a border that separates one country from another. In the case of Chhattisgarh, it is landlocked and is surrounded by other states within India.
Option 1, Bihar, is incorrect because Bihar shares an international boundary with Nepal. Nepal is a neighboring country to the north of Bihar.
Option 3, Uttarakhand, is incorrect because Uttarakhand also shares an international boundary with China. The northern part of Uttarakhand is bordered by the Tibet Autonomous Region of China.
Option 4, Meghalaya, is incorrect because Meghalaya shares an international boundary with Bangladesh. Meghalaya`s southern boundary is formed by the border with Bangladesh.
Therefore, the only correct option is option 2, Chhattisgarh, as it does not share an international boundary with any other country.