The correct answer is option 2, the Government of India Act, 1935. This act introduced the federal form of government in India. A federal form of government is one where power is divided between a central authority and various regional or state authorities. The Government of India Act, 1935 granted greater autonomy and powers to the provinces or states in India. It created provincial legislatures and allowed for the election of representatives. This act also established a federal structure with a central government and provincial governments with their own executive and legislative powers. The Act of 1935 was a significant step towards self-governance in India and paved the way for the eventual independence of the country.