Which one of the following is not a correct description of the nature

Which one of the following is not a correct description of the nature of India’s federalism?

India's federalism is based on the doctrine of 'Separation of Powers'
The Supreme Court of India is independently entitled to interpret the Constitution
There are different tiers of the Government and each tier has specified jurisdiction
Sources of revenue for each level of the Government are specified
This question was previously asked in
UPSC CBI DSP LDCE – 2023
Statement A is not a correct description of India’s federalism. While the doctrine of ‘Separation of Powers’ is a principle concerning the division of powers among the three organs of government (legislature, executive, judiciary), federalism primarily concerns the division of powers between different levels of government (Union and States). Indian federalism is characterized by a division of powers between the Union and the States as defined in the Constitution (Seventh Schedule), an independent judiciary to interpret the Constitution (Statement B), multiple tiers of government with specified jurisdictions (Statement C), and division of revenue sources (Statement D).
India’s federalism is based on the division of powers between levels of government, not primarily on the separation of powers among the organs of government.
Indian federalism is often described as ‘quasi-federal’ or ‘federal in form but unitary in spirit’ due to the strong central government, especially during emergencies. Key features include a written constitution, division of powers, supremacy of the constitution, independent judiciary, and bicameral legislature. However, it also has unitary features like a single constitution, single citizenship, integrated judiciary, appointment of state governors by the Centre, and the Union’s power to legislate on State subjects under certain conditions.