Step 1: Understanding the Question:
The Barga movement was a peasant movement about the rights of sharecroppers, called 'bargadars', who cultivated land owned by someone else and gave a share of the crop as rent.
Step 2: Identify the state.
The Barga movement (linked to 'Operation Barga') took place in West Bengal, where the state government later recorded bargadars and gave them legal protection against eviction, along with a fair share of the crop.
Step 3: Why the other options are wrong.
Rajasthan, Bihar and Uttar Pradesh saw their own separate peasant and land reform struggles, but the specific term 'Barga' and 'Operation Barga' is tied only to West Bengal's tenancy reform history.
Final Answer:
The Barga Movement is associated with West Bengal. This is option (A).