Alexander Cunningham:- was a British engineer and archaeologist who was appointed as the first Director-General of the Archaeological Survey of India (ASI) in 1871. His work laid the foundation for systematic archaeological research in India. He is known for his extensive surveys, documentation, and excavations of numerous sites, and is considered the Father of Indian Archaeology.
John Marshall:- was a later Director-General of the ASI, and is known for overseeing the excavations of Harappa and Mohenjo-Daro in the 1920s which led to the discovery of the Indus Valley Civilization. His contribution was also invaluable, but he was not the first director general.
Daya Ram Sahni:- was an Indian archaeologist known for his work in the Indus Valley Civilization and particularly for the excavation of Mohenjo-Daro. He worked under John Marshall, and was not a director general.
S.N. Roy:- was a scholar and historian, and his contribution was primarily to history and not archaeology. He did not hold any post at ASI.
Read the following source carefully and answer the questions that follow:
The orders of the king
Thus speaks king Devanampiya Piyadassi: In the past, there were no arrangements for disposing affairs, nor for receiving regular reports. But I have made the following (arrangement). Pativedakas should report to me about the affairs of the people at all times, anywhere, whether I am eating, in the inner apartment, in the bedroom, in the cow pen, being carried (possibly in a palanquin), or in the garden. And I will dispose of the affairs of the people everywhere.