Concept:The Government of India Act, 1935, was the primary source for many structural features of the Indian Constitution, such as the federal system and the powers of the central and state governments.
Explanation:The Indian Constitution borrowed heavily from the Government of India Act of 1935.
This Act introduced a federal system, provincial autonomy, and a detailed distribution of powers between the centre and provinces.
Key features taken from this Act include the federal scheme, the office of Governor, the judiciary structure, and the emergency provisions.
The 1935 Act also provided a blueprint for the administrative machinery and the civil services.
Even though the Constitution later adopted a parliamentary system inspired by Britain, the core administrative and federal framework came from the 1935 Act.
The 1909 Act (Morley-Minto) introduced separate electorates, but did not provide a comprehensive framework.
The 1919 Act (Montagu-Chelmsford) introduced dyarchy, but was limited.
The Indian Independence Act 1947 merely granted independence and partitioned the country, offering no detailed constitutional provisions.
Therefore, the Constitution's largest borrowing is from the 1935 Act.
Answer:C. 1935 Act