Concept:The Khoti System was an exploitative land revenue system in which Khots collected revenue from peasants.Explanation:The Khoti System was mainly implemented in the Konkan region of Maharashtra.It was especially prevalent in Raigad, Ratnagiri, and Sindhudurg districts.A Khot was a village-level official or zamindar who collected farm produce and revenue for the government.Farmers suffered heavy exploitation under this system.Dr. B. R. Ambedkar actively fought to end the Khoti System.Answer:The correct answer is D. Konkan.