Holt Mackenzie / होल्ट मैकेंजी
General competitive examinations frequently test candidates on Current Affairs topics. Questions like "Who was the main proponent of the Mahalwari system..." are designed to verify factual recall and general awareness. Regular practice on similar MCQs ensures a higher accuracy rate. The correct option here is Holt Mackenzie / होल्ट मैकेंजी.