Which one of the following is not a feature of Indian federalism?

Which one of the following is not a feature of Indian federalism?

Courts can interpret the Constitution and powers of different levels of the Government.
Sources of revenue for the Union Government and the State Governments are specified.
Powers of the Union and the States are specified in the Constitution.
Indian federalism is based on the principle of Separation of Powers.
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UPSC CAPF – 2022
Indian federalism is characterized by features like the division of powers between the Union and States (specified in the Constitution), specified sources of revenue, and the judiciary’s role in interpreting the Constitution and resolving disputes between different levels of government. The principle of Separation of Powers, while important for the functioning of the government, primarily deals with the division of powers *among* the legislature, executive, and judiciary *within* a level of government, not the division of powers *between* different levels (Union and States), which is the core of federalism.
Federalism involves the division of powers between a central government and regional governments. Key features include a written constitution, division of powers, supremacy of the constitution, independent judiciary, and dual government polity. Separation of powers is about checks and balances between governmental branches.
India has a quasi-federal structure with a strong center, but it retains essential features of federalism. Options A, B, and C are indeed characteristics of the Indian federal system. The division of powers is enshrined in the Seventh Schedule of the Constitution (Union List, State List, Concurrent List).