Which of the following areas of British India implemented the "Zamindari system"?

Bengal presidency

The correct answer is option 2: Bengal presidency

The "Zamindari system" was a major land settlement system which was implemented by the Bengal presidency.

The Zamindari system was implemented primarily in the Bengal presidency, which included parts of present-day West Bengal, Bihar, and Odisha. This system involved zamindars (landlords) who were given the rights to collect revenue from the peasants.