Answer : 4. "भारत सरकार अधिनियम, 1935"
Explanation :

The Government of India Act, 1935 exercised the most profound influence in framing the Indian Constitution. The Constituent Assembly, which was tasked with drafting the Indian Constitution, drew extensively from various sources, including the Government of India Act, 1935, as it provided a framework for federalism, provincial autonomy, and other constitutional principles.