After decisive victory at the Battle of Plassey, British became the rulers of ______.

Bengal

The correct answer is Option (4) → Bengal

After decisive victory at the Battle of Plassey, British became the rulers of Bengal.

The Battle of Plassey, fought on June 23, 1757, marked a significant turning point in Indian history. The British East India Company, under Robert Clive, defeated the Nawab of Bengal, Siraj-ud-Daulah, with the help of conspirators like Mir Jafar. As a result, the British gained political and economic control over Bengal, which became the cornerstone of their colonial expansion in India. This victory laid the foundation for nearly 200 years of British rule in the subcontinent.