The correct option, "2 and 3 only," reflects the accurate roles of a Banian and Mirasidar in the historical context of India. A Banian was indeed an Indian agent or intermediary for the East India Company, facilitating trade and negotiations, while a Mirasidar referred to landowners or revenue payers to the state, often responsible for paying taxes based on land revenue systems. In contrast, "Aurang," likely a misinterpretation of "Urzad," does not signify a specific role in treasury management, making it an incorrect pairing. Understanding these distinctions aids in grasping the intricate socio-economic interactions during colonial India and is essential for analytical questions in the UPSC examination.