Correct Answer: (c) Arabs
Note: Chachnama is one of the only written sources about the Arab conquest of Sindh, and therefore the origins of Islam in India. Chach Nama, also known as the Fateh Nama Sindh, is a valuable source of Arab history, written in Arabic by Kazi Ismail, who was appointed the first Qazi of Alor by Muhammad Qasim after the conquest of the Sindh.