Explanation:

- Option 1: Gujarat

- Gujarat is known for historical sites like the Rani ki Vav and the Gir National Park.

- However, Bidar Fort is not located here.

- Option 2: Rajasthan

- Rajasthan is famous for its deserts and palaces, like the Amber Fort and Jaisalmer Fort.

- But Bidar Fort is not found in this state.

- Option 3: Meghalaya

- Meghalaya boasts natural beauty, with places like Cherrapunji and the Living Root Bridges.

- Bidar Fort is not situated in Meghalaya.

- Option 4: Karnataka

- Karnataka is rich in history with landmarks like the Hampi ruins and Mysore Palace.

- Bidar Fort is indeed located in Karnataka.