The correct answer is option 1, the Simon Commission. The Government of India Act, 1935 was based on the recommendations of the Simon Commission, which was a group of British politicians sent to India in 1928 to propose reforms for governing the country. The Simon Commission`s recommendations formed the basis for the Act, and it included provisions for a federal government, provincial autonomy, and an expanded electorate. However, it is important to note that the Act was not entirely based on the Simon Commission`s recommendations, as there were modifications and amendments made during the drafting and passage of the Act. It is worth mentioning that option 2 (Lord Curzon Commission) is incorrect, as Lord Curzon had formed a different commission known as the Indian Statutory Commission or the Simon Commission.