After which battle did East India Company start appointing Residents in Indian States?

Battle of Buxar

The correct answer is Option 2- Battle of Buxar

The East India Company started appointing Residents in Indian States after the Battle of Buxar in 1764.

The Battle of Buxar was a decisive victory for the British over the combined forces of the Mughal emperor Shah Alam II, the Nawab of Awadh Shuja-ud-Daulah, and the Nawab of Bengal Mir Qasim. The battle effectively ended Mughal rule in India and established the British East India Company as the dominant power in the region.