The correct answer is option 4: Government of India Act, 1935. The Government of India Act, 1935 had a significant impact on the Constitution of India. It served as a blueprint for the structure and provisions of the Indian Constitution. The Act introduced the concept of federalism, which was later incorporated into the Indian Constitution. It also established the federal structure, division of powers between the central and state governments, and the establishment of a bicameral legislature. The Act also provided for the establishment of the All India Federation, which influenced the creation of the Union and state relationships in the Indian Constitution. It is important to note that while the other options may have influenced the Constitution indirectly through their ideas, the Government of India Act, 1935 had a more direct impact on the framing of the Indian Constitution.